The MOST COMMON 66 OBD DTC Problems Of Toyota Yaris

The MOST COMMON 66 DTC PROBLEMS Of Toyota Yaris

Hello Guys, I compiled all the command OBD DTC Diagnostic Trouble code of Toyota Yaris, Remember if this is the most common DTC meaning these are also the most common problem for Toyota Yaris.

DTC p0171: System too Lean (Bank 1)

Symptoms: Engine may hesitate or stall, decreased fuel efficiency, and a lack of power.
Cause: Vacuum leaks, a faulty mass air flow sensor, a malfunctioning oxygen sensor, or an incorrect fuel pressure.
Possible Location: Bank 1 refers to the side of the engine that contains cylinder 1.
How to Fix the Problem: The problem may be fixed by repairing vacuum leaks, replacing the mass air flow sensor, or replacing the oxygen sensor. If the problem is caused by incorrect fuel pressure, the fuel pressure regulator may need to be replaced.
Difficulty to Fix: Moderate
Can You Drive With This Code: Driving with this code is not recommended as it can lead to further engine damage and decreased fuel efficiency.
How to Clear the Code: The code can be cleared by disconnecting the battery or using an OBD-II scanner.
Hand Tools Needed: A vacuum gauge, an OBD-II scanner, and basic hand tools such as wrenches and pliers may be necessary to fix the problem.

DTC p0172: System too Rich (Bank 1)

Symptoms: Engine may hesitate or stall, decreased fuel efficiency, and a lack of power.
Cause: A malfunctioning oxygen sensor, a clogged air filter, a vacuum leak, or a faulty fuel injector.
Possible Location: Bank 1 refers to the side of the engine that contains cylinder 1.
How to Fix the Problem: The problem may be fixed by replacing the oxygen sensor, cleaning or replacing the air filter, repairing vacuum leaks, or replacing the fuel injector.
Difficulty to Fix: Moderate
Can You Drive With This Code: Driving with this code is not recommended as it can lead to further engine damage and decreased fuel efficiency.
How to Clear the Code: The code can be cleared by disconnecting the battery or using an OBD-II scanner.
Hand Tools Needed: An OBD-II scanner, basic hand tools such as wrenches and pliers, and a vacuum gauge may be necessary to fix the problem.

DTC p0500: Vehicle Speed Sensor (VSS) Circuit

Symptoms: The speedometer may not work, the transmission may not shift properly, and the ABS and traction control systems may be affected.
Cause: A malfunctioning VSS or a problem with the wiring or connections in the VSS circuit.
Possible Location: The VSS is typically located on the transmission or differential.
How to Fix the Problem: The VSS may need to be replaced, or the wiring and connections in the VSS circuit may need to be repaired.
Difficulty to Fix: Easy to Moderate
Can You Drive With This Code: Driving with this code may be possible, but the speedometer may not work and the ABS and traction control systems may be affected, so it is recommended to have the problem fixed as soon as possible.
How to Clear the Code: The code can be cleared by disconnecting the battery or using an OBD-II scanner.
Hand Tools Needed: An OBD-II scanner and basic hand tools such as wrenches and pliers may be necessary to fix the problem.

DTC p0420: Catalyst System Efficiency Below Threshold (Bank 1)

Symptoms: Engine may run poorly, decrease in fuel efficiency, and a lack of power.
Cause: A malfunctioning catalytic converter, a problem with the air/fuel mixture, or a problem with the oxygen sensor.
Possible Location: Bank 1 refers to the side of the engine that contains cylinder 1.
How to Fix the Problem: The catalytic converter may need to bereplaced, or the air/fuel mixture or oxygen sensor may need to be adjusted or replaced.
Difficulty to Fix: Moderate to Hard
Can You Drive With This Code: Driving with this code is not recommended as it can lead to further engine damage and decreased fuel efficiency.
How to Clear the Code: The code can be cleared by disconnecting the battery or using an OBD-II scanner.
Hand Tools Needed: An OBD-II scanner and basic hand tools such as wrenches and pliers may be necessary to fix the problem.

DTC p0010: “A” Camshaft Position Actuator Circuit (Bank 1)

Symptoms: Engine may run poorly, decrease in fuel efficiency, and a lack of power.
Cause: A malfunctioning camshaft position actuator, a problem with the wiring or connections in the actuator circuit, or a problem with the engine control module.
Possible Location: Bank 1 refers to the side of the engine that contains cylinder 1.
How to Fix the Problem: The camshaft position actuator may need to be replaced, or the wiring and connections in the actuator circuit may need to be repaired. The engine control module may also need to be replaced.
Difficulty to Fix: Moderate to Hard
Can You Drive With This Code: Driving with this code is not recommended as it can lead to further engine damage and decreased fuel efficiency.
How to Clear the Code: The code can be cleared by disconnecting the battery or using an OBD-II scanner.
Hand Tools Needed: An OBD-II scanner and basic hand tools such as wrenches and pliers may be necessary to fix the problem.

DTC p0016: Crankshaft/Camshaft Timing Misalignment (Bank 1 Sensor 1)

Symptoms: Engine may run poorly, decrease in fuel efficiency, and a lack of power.
Cause: A problem with the timing chain or belt, a malfunctioning crankshaft or camshaft position sensor, or a problem with the engine control module.
Possible Location: Bank 1 refers to the side of the engine that contains cylinder 1.
How to Fix the Problem: The timing chain or belt may need to be replaced, the crankshaft or camshaft position sensor may need to be replaced, or the engine control module may need to be replaced.
Difficulty to Fix: Moderate to Hard
Can You Drive With This Code: Driving with this code is not recommended as it can lead to further engine damage and decreased fuel efficiency.
How to Clear the Code: The code can be cleared by disconnecting the battery or using an OBD-II scanner.
Hand Tools Needed: An OBD-II scanner and basic hand tools such as wrenches and pliers may be necessary to fix the problem.

DTC p0810: Clutch Position Sensor Circuit

Symptoms: Engine may stall, the transmission may not shift properly, and the ABS and traction control systems may be affected.
Cause: A malfunctioning clutch position sensor, a problem with the wiring or connections in the sensor circuit, or a problem with the engine control module.
Possible Location: The clutch position sensor is typically located on the clutch pedal or near the clutch assembly.
How to Fix the Problem: The clutch position sensor may need to be replaced, or the wiring and connections in the sensor circuit may need to be repaired. The engine control module may also need to be replaced.
Difficulty to Fix: Easy to Moderate
Can You Drive With This Code: Driving with this code may be possible, but the engine may stall and the ABS and traction control systems may be affected, so it is recommended to have the problem fixed as soon as possible.
How to Clear the Code: The code can be cleared by disconnecting the battery or using an OBD-II scanner.
Hand Tools Needed: An OBD-II scanner and basic hand tools such as wrenches and pliers may be necessary to fix the problem.

DTC p0441: Evaporative Emission Control System Incorrect Purge Flow

Symptoms: Engine may run poorly, decrease in fuel efficiency, and a lack of power.
Cause: A problem with the evaporative emission control system, such as a clogged vapor canister, a malfunctioning purge valve, or a problem with the wiring or connections in the system.
Possible Location: The evaporative emission control system components are typically located near the fuel tank.
How to Fix the Problem: The vapor canister may need to be cleaned or replaced, the purge valve may need to be replaced, or the wiring and connections in the system may need to be repaired.
Difficulty to Fix: Easy to Moderate
Can You Drive With This Code: Driving with this code is not recommended as it can lead to further engine damage and decreased fuel efficiency.
How to Clear the Code: The code can be cleared by disconnecting the battery or using an OBD-II scanner.
Hand Tools Needed: An OBD-II scanner and basic hand tools such as wrenches and pliers may be necessary to fix the problem.

DTC p0900: Clutch Actuator Circuit/Open

Symptoms: Engine may stall, the transmission may not shift properly, and the ABS and traction control systems may be affected.
Cause: A malfunctioning clutch actuator, a problem with the wiring or connections in the actuator circuit, or a problem with the engine control module.
Possible Location: The clutch actuator is typically located near the clutch assembly.
How to Fix the Problem: The clutch actuator may need to be replaced, or the wiring and connections in the actuator circuit may need to be repaired. The engine control module may also need to be replaced.
Difficulty to Fix: Easy to Moderate
Can You Drive With This Code: Driving with this code may be possible, but the engine may stall and the ABS and traction control systems may be affected, so it is recommended to have the problem fixed as soon as possible.
How to Clear the Code: The code can be cleared by disconnecting the battery or using an OBD-II scanner.
Hand Tools Needed: An OBD-II scanner and basic hand tools such as wrenches and pliers may be necessary to fix the problem.

DTC p1604: Internal Control Module Memory Check Sum Error

Symptoms: Engine may run poorly, decrease in fuel efficiency, and a lack of power.
Cause: A problem with the engine control module, such as a malfunctioning component or a problem with the wiring or connections.
Possible Location: The engine control module is typically located near the engine.
How to Fix the Problem: The engine control module may need to be replaced or repaired.
Difficulty to Fix: Moderate to Hard
Can You Drive With This Code: Driving with this code is not recommended as it can lead to further engine damage and decreased fuel efficiency.
How to Clear the Code: The code can be cleared by disconnecting the battery or using an OBD-II scanner.
Hand Tools Needed: An OBD-II scanner and basic hand tools such as wrenches and pliers may be necessary to fix the problem.

DTC p1346: Variable Valve Timing System Malfunction (Bank 1)

Symptoms: Engine may run poorly, decrease in fuel efficiency, and a lack of power.
Cause: A problem with the variable valve timing system, such as a malfunctioning component or a problem with the wiring or connections.
Possible Location: Bank 1 refers to the side of the engine that contains cylinder 1.
How to Fix the Problem: The variable valve timing system may need to be repaired or replaced.
Difficulty to Fix: Moderate to Hard
Can You Drive With This Code: Driving with this code is not recommended as it can lead to further engine damage and decreased fuel efficiency.
How to Clear the Code: The code can be cleared by disconnecting the battery or using an OBD-II scanner.
Hand Tools Needed: An OBD-II scanner and basic hand tools such as wrenches and pliers may be necessary to fix the problem.

DTC p1603: Internal Control Module Memory Check Sum Error

DTC p1605: Internal Control Module Keep Alive Memory (KAM) Error

DTC p1272: Fuel Level Sensor Circuit

Symptoms: The fuel gauge may not work accurately, the engine may stall, and the ABS and traction control systems may be affected.
Cause: A malfunctioning fuel level sensor, a problem with the wiring or connections in the sensor circuit, or a problem with the engine control module.
Possible Location: The fuel level sensor is typically located in the fuel tank.
How to Fix the Problem: The fuel level sensor may need to be replaced, or the wiring and connections in the sensor circuit may need to be repaired. The engine control module may also need to be replaced.
Difficulty to Fix: Easy to Moderate
Can You Drive With This Code: Driving with this code may be possible, but the fuel gauge may not work accurately and the engine may stall, so it is recommended to have the problem fixed as soon as possible.
How to Clear the Code: The code can be cleared by disconnecting the battery or using an OBD-II scanner.
Hand Tools Needed: An OBD-II scanner and basic hand tools such as wrenches and pliers may be necessary to fix the problem.

DTC p2196: O2 Sensor Signal Stuck Lean (Bank 1 Sensor 1)

Symptoms: Engine may run poorly, decrease in fuel efficiency, and a lack of power.
Cause: A malfunctioning oxygen sensor, a problem with the air/fuel mixture, or a problem with the engine control module.
Possible Location: Bank 1 refers to the side of the engine that contains cylinder 1.
How to Fix the Problem: The oxygen sensor may need to be replaced, the air/fuel mixture may need to be adjusted, or the engine control module may need to be replaced.
Difficulty to Fix: Easy to Moderate
Can You Drive With This Code: Driving with this code is not recommended as it can lead to further engine damage and decreased fuel efficiency.
How to Clear the Code: The code can be cleared by disconnecting the battery or using an OBD-II scanner.
Hand Tools Needed: An OBD-II scanner and basic hand tools such as wrenches and pliers may be necessary to fix the problem.

DTC p2118: Throttle Actuator Control Module Processor

Symptoms: Engine may stall, the throttle may not respond properly, and the ABS and traction control systems may be affected.
Cause: A malfunctioning throttle actuator control module, a problem with the wiring or connections in the module circuit, or a problem with the engine control module.
Possible Location: The throttle actuator control module is typically located near the throttle body.
How to Fix the Problem: The throttle actuator control module may need to be replaced, or the wiring and connections in the module circuit may need to be repaired. The engine control module may also need to be replaced.
Difficulty to Fix: Moderate to Hard
Can You Drive With This Code: Driving with this code is not recommended as it can lead to further engine damage and decreased fuel efficiency.
How to Clear the Code: The code can be cleared by disconnecting the battery or using an OBD-II scanner.
Hand Tools Needed: An OBD-II scanner and basic hand tools such as wrenches and pliers may be necessary to fix the problem.

Learn More👉 Nissan accelerator pedal position (APP) sensor

DTC p2463: Diesel Particulate Filter Restriction – Soot Accumulation

Symptoms: Engine may run poorly, decrease in fuel efficiency, and a lack of power.
Cause: A clogged diesel particulate filter, a problem with the diesel fuel system, or a problem with the engine control module.
Possible Location: The diesel particulate filter is typically located near the exhaust system.
How to Fix the Problem: The diesel particulate filter may need to be cleaned or replaced, the diesel fuel system may need to be repaired, or the engine control module may need to be replaced.
Difficulty to Fix: Moderate to Hard
Can You Drive With This Code: Driving with this code is not recommended as it can lead to further engine damage and decreased fuel efficiency.
How to Clear the Code: The code can be cleared by disconnecting the battery or using an OBD-II scanner.
Hand Tools Needed: An OBD-II scanner and basic hand tools such as wrenches and pliers may be necessary to fix the problem.

DTC p2238: O2 Sensor Positive Current Control Circuit/Open (Bank 1 Sensor 2)

Symptoms: Engine may run poorly, decrease in fuel efficiency, and a lack of power.
Cause: A malfunctioning oxygen sensor, a problem with the wiring or connections in the sensor circuit, or a problem with the engine control module.
Possible Location: Bank 1 refers to the side of the engine that contains cylinder 1.
How to Fix the Problem: The oxygen sensor may need to be replaced, the wiring and connections in the sensor circuit may need to be repaired, or the engine control module may need to be replaced.
Difficulty to Fix: Easy to Moderate
Can You Drive With This Code: Driving with this code is not recommended as it can lead to further engine damage and decreased fuel efficiency.
How to Clear the Code: The code can be cleared by disconnecting the battery or using an OBD-II scanner.
Hand Tools Needed: An OBD-II scanner and basic hand tools such as wrenches and pliers may be necessary to fix the problem.

DTC p2112: Throttle Actuator Control System – Stuck Closed

Symptoms: Engine may stall, the throttle may not respond properly, and the ABS and traction control systems may be affected.
Cause: A malfunctioning throttle actuator control system, a problem with the wiring or connections in the system, or a problem with the engine control module.
Possible Location: The throttle actuator control system is typically located near the throttle body.
How to Fix the Problem: The throttle actuator control system may need to be repaired or replaced, the wiring and connections in the system may need to be repaired, or the engine control module may need to be replaced.
Difficulty to Fix: Moderate to Hard
Can You Drive With This Code: Driving with this code is not recommended as it can lead to further engine damage and decreased fuel efficiency.
How to Clear the Code: The code can be cleared by disconnecting the battery or using an OBD-II scanner.
Hand Tools Needed: An OBD-II scanner and basic hand tools such as wrenches and pliers may be necessary to fix the problem.

DTC p2111: Throttle Actuator Control System – Stuck Open

Symptoms: Engine may run poorly, the throttle may not respond properly, and the ABS and traction control systems may be affected.
Cause: A malfunctioning throttle actuator control system, a problem with the wiring or connections in the system, or a problem with the engine control module.
Possible Location: The throttleactuator control system is typically located near the throttle body.
How to Fix the Problem: The throttle actuator control system may need to be repaired or replaced, the wiring and connections in the system may need to be repaired, or the engine control module may need to be replaced.
Difficulty to Fix: Moderate to Hard
Can You Drive With This Code: Driving with this code is not recommended as it can lead to further engine damage and decreased fuel efficiency.
How to Clear the Code: The code can be cleared by disconnecting the battery or using an OBD-II scanner.
Hand Tools Needed: An OBD-II scanner and basic hand tools such as wrenches and pliers may be necessary to fix the problem.

DTC p2610: System Relay Control Circuit

Symptoms: Engine may stall, the ABS and traction control systems may be affected, and other electrical systems may not work properly.
Cause: A malfunctioning system relay, a problem with the wiring or connections in the relay circuit, or a problem with the engine control module.
Possible Location: The system relay is typically located near the battery or the engine control module.
How to Fix the Problem: The system relay may need to be replaced, the wiring and connections in the relay circuit may need to be repaired, or the engine control module may need to be replaced.
Difficulty to Fix: Easy to Moderate
Can You Drive With This Code: Driving with this code is not recommended as it can lead to further engine damage and decreased fuel efficiency.
How to Clear the Code: The code can be cleared by disconnecting the battery or using an OBD-II scanner.
Hand Tools Needed: An OBD-II scanner and basic hand tools such as wrenches and pliers may be necessary to fix the problem.

DTC p2109: Throttle Actuator Control Module Processor

DTC p3000: Battery Voltage Low

Symptoms: Engine may stall, the ABS and traction control systems may be affected, and other electrical systems may not work properly.
Cause: A weak battery, a problem with the alternator, or a problem with the wiring or connections in the electrical system.
Possible Location: The battery is typically located under the hood of the vehicle, and the alternator is typically located near the engine.
How to Fix the Problem: The battery may need to be replaced, the alternator may need to be repaired or replaced, or the wiring and connections in the electrical system may need to be repaired.
Difficulty to Fix: Easy to Moderate
Can You Drive With This Code: Driving with this code is not recommended as it can lead to further engine damage and decreased fuel efficiency.
How to Clear the Code: The code can be cleared by disconnecting the battery or using an OBD-II scanner.
Hand Tools Needed: An OBD-II scanner and basic hand tools such as wrenches and pliers may be necessary to fix the problem.

DTC b1826: Airbag (SRS) control unit communication error

Symptoms: Airbag warning light may be illuminated on the dashboard, the airbags may not deploy in the event of a crash, and other safety systems may not function properly.
Cause: A problem with the airbag control unit, a problem with the wiring or connections in the airbag system, or a problem with the engine control module.
Possible Location: The airbag control unit is typically located under the dashboard.
How to Fix the Problem: The airbag control unit may need to be replaced, or the wiring and connections in the airbag system may need to be repaired. The engine control module may also need to be replaced.
Difficulty to Fix: Moderate to Hard
Can You Drive With This Code: Driving with this code is not recommended as it can affect the proper functioning of the airbags and other safety systems.
How to Clear the Code: The code can be cleared by disconnecting the battery or using an OBD-II scanner.
Hand Tools Needed: An OBD-II scanner and basic hand tools such as wrenches and pliers may be necessary to fix the problem.

DTC b1423: Front passenger airbag sensor circuit malfunction

Symptoms: The airbag warning light may be illuminated on the dashboard, the front passenger airbag may not deploy in the event of a crash, and other safety systems may not function properly.
Cause: A problem with the front passenger airbag sensor, a problem with the wiring or connections in the sensor circuit, or a problem with the engine control module.
Possible Location: The front passenger airbag sensor is typically located in the front passenger seat.
How to Fix the Problem: The front passenger airbag sensor may need to be replaced, or the wiring and connections in the sensor circuit may need to be repaired. The engine control module may also need to be replaced.
Difficulty to Fix: Easy to Moderate
Can You Drive With This Code: Driving with this code is not recommended as it can affect the proper functioning of the airbags and other safety systems.
How to Clear the Code: The code can be cleared by disconnecting the battery or using an OBD-II scanner.
Hand Tools Needed: An OBD-II scanner and basic hand tools such as wrenches and pliers may be necessary to fix the problem.

DTC b1100: Airbag (SRS) system voltage low

Symptoms: The airbag warning light may be illuminated on the dashboard, the airbags may not deploy in the event of a crash, and other safety systems may not function properly.
Cause: A problem with the battery or alternator, a problem with the wiring or connections in the airbag system, or a problem with the engine control module.
Possible Location: The battery and alternator are typically located under the hood of the vehicle.
How to Fix the Problem: The battery or alternator may need to be replaced, or the wiring and connections in the airbag system may need to be repaired. The engine control module may also need to be replaced.
Difficulty to Fix: Easy to Moderate
Can You Drive With This Code: Driving with this code is not recommended as it can affect the proper functioning of the airbags and other safety systems.
How to Clear the Code: The code can be cleared by disconnecting the battery or using an OBD-II scanner.
Hand Tools Needed: An OBD-II scanner and basic hand tools such as wrenches and pliers may be necessary to fix the problem.

DTC b1821: Airbag (SRS) system malfunction

Symptoms: The airbag warning light may be illuminated on the dashboard, the airbags may not deploy in the event of a crash, and other safety systems may not function properly.
Cause: A problem with the airbag system, a problem with the wiring or connections in the airbag system, or a problem with the engine control module.
Possible Location: The airbag system components are typically located throughout the vehicle.
How to Fix the Problem: The airbag system components may need to be repaired or replaced, the wiring and connections in the airbag system may need to be repaired, or the engine control module may need to be replaced.
Difficulty to Fix: Moderate to Hard
Can You Drive With This Code: Driving with this code is not recommended as it can affect the proper functioning of the airbags and other safety systems.
How to Clear the Code: The code can be cleared by disconnecting the battery or using an OBD-II scanner.
Hand Tools Needed: An OBD-II scanner and basic hand tools such as wrenches and pliers may be necessary to fix the problem.

DTC b1660: Airbag (SRS) driver side circuit malfunction

Symptoms: The airbag warning light may be illuminated on the dashboard, the driver side airbag may not deploy in the event of a crash, and other safety systems may not function properly.
Cause: A problem with the driver side airbag sensor, a problem with the wiring or connections in the sensor circuit, or a problem with the engine control module.
Possible Location: The driver side airbag sensor is typically located in the driver’s seat.
How to Fix the Problem: The driver side airbag sensor may need to be replaced, or the wiring and connections in the sensor circuit may need to be repaired. The engine control module may also need to be replaced.
Difficulty to Fix: Easy to Moderate
Can You Drive With This Code: Driving with this code is not recommended as it can affect the proper functioning of the airbags and other safety systems.
How to Clear the Code: The code can be cleared by disconnecting the battery or using an OBD-II scanner.
Hand Tools Needed: An OBD-II scanner and basic hand tools such as wrenches and pliers may be necessary to fix the problem.

DTC b1801: Airbag (SRS) passenger side circuit malfunction

Symptoms: The airbag warning light may be illuminated on the dashboard, the passenger side airbag may not deploy in the event of a crash, and other safety systems may not function properly.
Cause: A problem with the passenger side airbag sensor, a problem with the wiring or connections in the sensor circuit, or a problem with the engine control module.
Possible Location: The passenger side airbag sensor is typically located in the front passenger seat.
How to Fix the Problem: The passenger side airbag sensor may need to be replaced, or the wiring and connections in the sensor circuit may need to be repaired. The engine control module may also need to be replaced.
Difficulty to Fix: Easy to Moderate
Can You Drive With This Code: Driving with this code is not recommended as it can affect the proper functioning of the airbags and other safety systems.
How to Clear the Code: The code can be cleared by disconnecting the battery or using an OBD-II scanner.
Hand Tools Needed: An OBD-II scanner and basic hand tools such as wrenches and pliers maybe necessary to fix the problem.

DTC b1412: Airbag (SRS) system internal circuit malfunction

Symptoms: The airbag warning light may be illuminated on the dashboard, the airbags may not deploy in the event of a crash, and other safety systems may not function properly.
Cause: A problem with the airbag system components, a problem with the wiring or connections in the airbag system, or a problem with the engine control module.
Possible Location: The airbag system components are typically located throughout the vehicle.
How to Fix the Problem: The airbag system components may need to be repaired or replaced, the wiring and connections in the airbag system may need to be repaired, or the engine control module may need to be replaced.
Difficulty to Fix: Moderate to Hard
Can You Drive With This Code: Driving with this code is not recommended as it can affect the proper functioning of the airbags and other safety systems.
How to Clear the Code: The code can be cleared by disconnecting the battery or using an OBD-II scanner.
Hand Tools Needed: An OBD-II scanner and basic hand tools such as wrenches and pliers may be necessary to fix the problem.

DTC b1421: Airbag (SRS) system deployment loop open circuit

Symptoms: The airbag warning light may be illuminated on the dashboard, the airbags may not deploy in the event of a crash, and other safety systems may not function properly.
Cause: A problem with the airbag system components, a problem with the wiring or connections in the airbag system, or a problem with the engine control module.
Possible Location: The airbag system components are typically located throughout the vehicle.
How to Fix the Problem: The airbag system components may need to be repaired or replaced, the wiring and connections in the airbag system may need to be repaired, or the engine control module may need to be replaced.
Difficulty to Fix: Moderate to Hard
Can You Drive With This Code: Driving with this code is not recommended as it can affect the proper functioning of the airbags and other safety systems.
How to Clear the Code: The code can be cleared by disconnecting the battery or using an OBD-II scanner.
Hand Tools Needed: An OBD-II scanner and basic hand tools such as wrenches and pliers may be necessary to fix the problem.

Learn More👉 TOP 15 MOST Common OBD DTC of Toyota Tacoma

DTC b1650: Airbag (SRS) deployment loop circuit malfunction

Symptoms: The airbag warning light may be illuminated on the dashboard, the airbags may not deploy in the event of a crash, and other safety systems may not function properly.
Cause: A problem with the airbag system components, a problem with the wiring or connections in the airbag system, or a problem with the engine control module.
Possible Location: The airbag system components are typically located throughout the vehicle.
How to Fix the Problem: The airbag system components may need to be repaired or replaced, the wiring and connections in the airbag system may need to be repaired, or the engine control module may need to be replaced.
Difficulty to Fix: Moderate to Hard
Can You Drive With This Code: Driving with this code is not recommended as it can affect the proper functioning of the airbags and other safety systems.
How to Clear the Code: The code can be cleared by disconnecting the battery or using an OBD-II scanner.
Hand Tools Needed: An OBD-II scanner and basic hand tools such as wrenches and pliers may be necessary to fix the problem.

DTC b1901: Airbag (SRS) deployment loop circuit open

Symptoms: The airbag warning light may be illuminated on the dashboard, the airbags may not deploy in the event of a crash, and other safety systems may not function properly.
Cause: A problem with the airbag system components, a problem with the wiring or connections in the airbag system, or a problem with the engine control module.
Possible Location: The airbag system components are typically located throughout the vehicle.
How to Fix the Problem: The airbag system components may need to be repaired or replaced, the wiring and connections in the airbag system may need to be repaired, or the engine control module may need to be replaced.
Difficulty to Fix: Moderate to Hard
Can You Drive With This Code: Driving with this code is not recommended as it can affect the proper functioning of the airbags and other safety systems.
How to Clear the Code: The code can be cleared by disconnecting the battery or using an OBD-II scanner.
Hand Tools Needed: An OBD-II scanner and basic hand tools such as wrenches and pliers may be necessary to fix the problem.

DTC b0111: Airbag (SRS) system internal fault

Symptoms: The airbag warning light may be illuminated on the dashboard, the airbags may not deploy in the event of a crash, and other safety systems may not function properly.
Cause: A problem with the airbag system components, a problem with the wiring or connections in the airbag system, or a problem with the engine control module.
Possible Location: The airbag system components are typically located throughout the vehicle.
How to Fix the Problem: The airbag system components may need to be repaired or replaced, the wiring and connections in the airbag system may need to be repaired, or the engine control module may need to be replaced.
Difficulty to Fix: Moderate to Hard
Can You Drive With This Code: Driving with this code is not recommended as it can affect the proper functioning of the airbags and other safety systems.
How to Clear the Code: The code can be cleared by disconnecting the battery or using an OBD-II scanner.
Hand Tools Needed: An OBD-II scanner and basic hand tools such as wrenches and pliers may be necessary to fix the problem.

DTC b2799: Engine immobilizer system malfunction

Symptoms: The engine may not start or may stall, the key warning light may be illuminated on the dashboard.
Cause: A problem with the engine immobilizer system, a problem with the key or the transponder in the key, or a problem with the engine control module.
Possible Location: The engine immobilizer system components are typically located in the engine compartment and the steering column.
How to Fix the Problem: The engine immobilizer system components may need to be repaired or replaced, the key or transponder may need to be replaced, or the engine control module may need to be replaced.
Difficulty to Fix: Easy to Moderate
Can You Drive With This Code: Driving is not possible with this code.
How to Clear the Code: The code can be cleared by disconnecting the battery or using an OBD-II scanner.
Hand Tools Needed: An OBD-II scanner and basic hand tools such as wrenches and pliers may be necessary to fix the problem.

DTC b2796: Engine immobilizer system malfunction

Symptoms:The engine may not start or may stall, the key warning light may be illuminated on the dashboard.
Cause: A problem with the engine immobilizer system, a problem with the key or the transponder in the key, or a problem with the engine control module.
Possible Location: The engine immobilizer system components are typically located in the engine compartment and the steering column.
How to Fix the Problem: The engine immobilizer system components may need to be repaired or replaced, the key or transponder may need to be replaced, or the engine control module may need to be replaced.
Difficulty to Fix: Easy to Moderate
Can You Drive With This Code: Driving is not possible with this code.
How to Clear the Code: The code can be cleared by disconnecting the battery or using an OBD-II scanner.
Hand Tools Needed: An OBD-II scanner and basic hand tools such as wrenches and pliers may be necessary to fix the problem.

DTC b2799: Engine immobilizer system malfunction

DTC b279a: Engine immobilizer system malfunction

DTC b2321: Engine immobilizer system malfunction

DTC C0278: ABS pump motor circuit malfunction

Symptoms: The ABS warning light may be illuminated on the dashboard, the ABS system may not function properly.
Cause: A problem with the ABS pump motor, a problem with the ABS pump motor relay, or a problem with the ABS control module.
Possible Location: The ABS pump motor and relay are typically located in the engine compartment, and the ABS control module is typically located under the dashboard.
How to Fix the Problem: The ABS pump motor may need to be repaired or replaced, the ABS pump motor relay may need to be replaced, or the ABS control module may need to be replaced.
Difficulty to Fix: Easy to Moderate
Can You Drive With This Code: Driving is possible, but the ABS system may not function properly in the event of an emergency stop.
How to Clear the Code: The code can be cleared by disconnecting the battery or using an OBD-II scanner.
Hand Tools Needed: An OBD-II scanner and basic hand tools such as wrenches and pliers may be necessary to fix the problem.

DTC C0200: ABS control module internal fault

Symptoms: The ABS warning light may be illuminated on the dashboard, the ABS system may not function properly.
Cause: A problem with the ABS control module, a problem with the ABS control module software, or a problem with the ABS control module wiring.
Possible Location: The ABS control module is typically located under the dashboard.
How to Fix the Problem: The ABS control module may need to be repaired or replaced, the ABS control module software may need to be updated, or the ABS control module wiring may need to be repaired.
Difficulty to Fix: Moderate to Hard
Can You Drive With This Code: Driving is possible, but the ABS system may not function properly in the event of an emergency stop.
How to Clear the Code: The code can be cleared by disconnecting the battery or using an OBD-II scanner.
Hand Tools Needed: An OBD-II scanner and basic hand tools such as wrenches and pliers may be necessary to fix the problem.

DTC C0210: ABS pump motor relay circuit malfunction

Symptoms: The ABS warning light may be illuminated on the dashboard, the ABS system may not function properly.
Cause: A problem with the ABS pump motor relay, a problem with the ABS pump motor relay wiring, or a problem with the ABS control module.
Possible Location: The ABS pump motor relay is typically located in the engine compartment, and the ABS control module is typically located under the dashboard.
How to Fix the Problem: The ABS pump motor relay may need to be replaced, the ABS pump motor relay wiring may need to be repaired, or the ABS control module may need to be replaced.
Difficulty to Fix: Easy to Moderate
Can You Drive With This Code: Driving is possible, but the ABS system may not function properly in the event of an emergency stop.
How to Clear the Code: The code can be cleared by disconnecting the battery or using an OBD-II scanner.
Hand Tools Needed: An OBD-II scanner and basic hand tools such as wrenches and pliers may be necessary to fix the problem.

Note: This information is general in nature and may vary depending on the specific vehicle make and model. It is always recommended to consult with a professional mechanic for a proper diagnosis and repair.

DTC C0215: ABS pump motor relay circuit malfunction

DTC C1201: Engine control system malfunction

Symptoms: The engine may not start or may stall, the check engine light may be illuminated on the dashboard.
Cause: A problem with the engine control module, a problem with the engine control module software, or a problem with the engine control module wiring.
Possible Location: The engine control module is typically located in the engine compartment.
How to Fix the Problem: The engine control module may need to be repaired or replaced, the engine control module software may need to be updated, or the engine control module wiring may need to be repaired.
Difficulty to Fix: Moderate to Hard
Can You Drive With This Code: Driving is possible, but the engine may not perform optimally or may stall.
How to Clear the Code: The code can be cleared by disconnecting the battery or using an OBD-II scanner.
Hand Tools Needed: An OBD-II scanner and basic hand tools such as wrenches and pliers may be necessary to fix the problem.

DTC C1241: Engine control system malfunction

DTC C1251: Engine control system malfunction

Learn More👉 Toyota OBD DTC P1130 Check Engine Code

DTC C1332: Engine control system malfunction

DTC C1223: Engine control system malfunction

DTC C1237: Engine control system malfunction

DTC C1336: Engine control system malfunction

DTC C1554: Engine control system malfunction

DTC C1203: Engine control system malfunction

DTC C2126: Engine control system malfunction

DTC U0105: Lost communication with engine control module

Symptoms: The engine may not start or may stall, the check engine light may be illuminated on the dashboard.
Cause: A problem with the engine control module, a problem with the engine control module wiring, or a problem with the communication between the engine control module and the vehicle’s main computer.
Possible Location: The engine control module is typically located in the engine compartment, and the vehicle’s main computer is typically located under the dashboard.
How to Fix the Problem: The engine control module may need to be repaired or replaced, the engine control module wiring may need to be repaired, or the communication between the engine control module and the vehicle’s main computer may need to be repaired.
Difficulty to Fix: Moderate to Hard
Can You Drive With This Code: Driving is possible, but the engine may not perform optimally or may stall.
How to Clear the Code: The code can be cleared by disconnecting the battery or using an OBD-II scanner.
Hand Tools Needed: An OBD-II scanner and basic hand tools such as wrenches and pliers may be necessary to fix the problem.

DTC U0100: Lost communication with engine control module

Symptoms: The engine may not start or may stall, the check engine light may be illuminated on the dashboard.
Cause: A problem with the engine control module, a problem with the engine control module wiring, or a problem with the communication between the engine control module and the vehicle’s main computer.
Possible Location: The engine control module is typically located in the engine compartment, and the vehicle’s main computer is typically located under the dashboard.
How to Fix the Problem: The engine control module may need to be repaired or replaced, the engine control module wiring may need to be repaired, or the communication between the engine control module and the vehicle’s main computer may need to be repaired.
Difficulty to Fix: Moderate to Hard
Can You Drive With This Code: Driving is possible, but the engine may not perform optimally or may stall.
How to Clear the Code: The code can be cleared by disconnecting the battery or using an OBD-II scanner.
Hand Tools Needed: An OBD-II scanner and basic hand tools such as wrenches and pliers may be necessary to fix the problem.

DTC U0129: Lost communication with engine control module

Symptoms: The engine may not start or may stall, the check engine light may be illuminated on the dashboard.
Cause: A problem with the engine control module, a problem with the engine control module wiring, or a problem with the communication between the engine control module and the vehicle’s main computer.
Possible Location: The engine control module is typically located in the engine compartment, and the vehicle’s main computer is typically located under the dashboard.
How to Fix the Problem: The engine control module may need to be repaired or replaced, the engine control module wiring may need to be repaired, or the communication between the engine control module and the vehicle’s main computer may need to be repaired.
Difficulty to Fix: Moderate to Hard
Can You Drive With This Code: Driving is possible, but the engine may not perform optimally or may stall.
How to Clear the Code: The code can be cleared by disconnecting the battery or using an OBD-II scanner.
Hand Tools Needed: An OBD-II scanner and basic hand tools such as wrenches and pliers may be necessary to fix the problem.

DTC U0073: Lost communication with engine control module

Symptoms: The engine may not start or may stall, the check engine light may be illuminated on the dashboard.
Cause: A problem with the engine control module, a problem with the engine control module wiring, or a problem with the communication between the engine control module and the vehicle’s main computer.
Possible Location: The engine control module is typically located in the engine compartment, and the vehicle’s main computer is typically located under the dashboard.
How to Fix the Problem: The engine control module may need to be repaired or replaced, the engine control module wiring may need to be repaired, or the communication between the engine control module and the vehicle’s main computer may need to be repaired.
Difficulty to Fix: Moderate to Hard
Can You Drive With This Code: Driving is possible, but the engine may not perform optimally or may stall.
How to Clear the Code: The code can be cleared by disconnecting the battery or using an OBD-II scanner.
Hand Tools Needed: An OBD-II scanner and basic hand tools such as wrenches and pliers may be necessary to fix the problem.

DTC U0142: Lost communication with engine control module

Symptoms: The engine may not start or may stall, the check engine light may be illuminated on the dashboard.
Cause: A problem with the engine control module, a problem with the engine control module wiring, or a problem with the communication between the engine control module and the vehicle’s main computer.
Possible Location: The engine control module is typically located in the engine compartment, and the vehicle’s main computer is typically located under the dashboard.
How to Fix the Problem: The engine control module may need to be repaired or replaced, the engine control module wiring may need to be repaired, or the communication between the engine control module and the vehicle’s main computer may need to be repaired.
Difficulty to Fix: Moderate to Hard
Can You Drive With This Code: Driving is possible, but the engine may not perform optimally or may stall.
How to Clear the Code: The code can be cleared by disconnecting the battery or using an OBD-II scanner.
Hand Tools Needed: An OBD-II scanner and basic hand tools such as wrenches and pliers may be necessary to fix the problem.

DTC U0121: Lost communication with engine control module

Symptoms: The engine may not start or may stall, the check engine light may be illuminated on the dashboard.
Cause: A problem with the engine control module, a problem with the engine control module wiring, or a problem with the communication between the engine control module and the vehicle’s main computer.
Possible Location: The engine control module is typically located in the engine compartment, and the vehicle’s main computer is typically located under the dashboard.
How to Fix the Problem: The engine control module may need to be repaired or replaced, the engine control module wiring may need to be repaired, or the communication between the engine control module and the vehicle’s main computer may need to be repaired.
Difficulty to Fix: Moderate to Hard
Can You Drive With This Code: Driving is possible, but the engine may not perform optimally or may stall.
How to Clear the Code: The code can be cleared by disconnecting the battery or using an OBD-II scanner.
Hand Tools Needed: An OBD-II scanner and basic hand tools such as wrenches and pliers may be necessary to fix the problem.

DTC U0140: Lost communication with engine control module

Symptoms: The engine may not start or may stall, the check engine light may be illuminated on the dashboard.
Cause: A problem with the engine control module, a problem with the engine control module wiring, or a problem with the communication between the engine control module and the vehicle’s main computer.
Possible Location: The engine control module is typically located in the engine compartment, and the vehicle’s main computer is typically located under the dashboard.
How to Fix the Problem: The engine control module may need to be repaired or replaced, the engine control module wiring may need to be repaired, or the communication between the engine control module and the vehicle’s main computer may need to be repaired.
Difficulty to Fix: Moderate to Hard
Can You Drive With This Code: Driving is possible, but the engine may not perform optimally or may stall.
How to Clear the Code: The code can be cleared by disconnecting the battery or using an OBD-II scanner.
Hand Tools Needed: An OBD-II scanner and basic hand tools such as wrenches and pliers may be necessary to fix the problem.

These information is researched and compiled by Erwin C. Salarda