TOP 15 MOST Common OBD DTC of Toyota Tacoma

TOP 15 MOST Common OBD DTC of Toyota Tacoma

These are the top 15 most common DTCs on a Toyota Tacoma P0171, P0174, P0120, P0300, P0304, P0456, P0420, P0430, P0500, P2195, P2196, P2198, P2197, P0440, P0441, P2195, P2196, P2198, P2197, P0440 and P0441.

The Toyota Tacoma is a popular pickup truck known for its reliability and versatility. However, even the most reliable vehicles can experience issues, and the onboard diagnostic (OBD) system can help detect these problems. In this article, we will discuss the top 15 most common OBD diagnostic trouble codes (DTC) found in Toyota Tacomas. Understanding these codes and the associated symptoms, causes, and solutions can help you diagnose and fix problems with your vehicle.

TACOMA TOP  15 OBD  DTC’s

TACOMA DTC P0171:

Description: System too Lean (Bank 1)
Symptoms: Engine Light On, Engine Misfire, Poor Engine Performance, Engine Stalls, Engine Surges.
Cause: Vacuum Leaks, Malfunctioning Fuel Injectors, Dirty Mass Air Flow Sensor, Dirty Throttle Body, Fuel Pressure Regulator Issues.
Possible Location: Engine Control Module, Fuel Injectors, Mass Air Flow Sensor, Throttle Body, Fuel Pressure Regulator.
How to Fix the Problem: Inspect for Vacuum Leaks, Clean or Replace Mass Air Flow Sensor, Clean or Replace Throttle Body, Replace Fuel Pressure Regulator.
How Difficult to Fix: Moderate
Can You Drive With This Code: Yes, but it is not recommended as it may lead to further damage to the engine.
How to Clear the Code: Disconnect the battery, Use an OBD-II Scanner.
Tools Need to use: OBD-II Scanner, Vacuum Gauge, Fuel Pressure Tester.

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TACOMA DTC P0174:

Description: System too Lean (Bank 2)
Symptoms: Engine Light On, Engine Misfire, Poor Engine Performance, Engine Stalls, Engine Surges.
Cause: Vacuum Leaks, Malfunctioning Fuel Injectors, Dirty Mass Air Flow Sensor, Dirty Throttle Body, Fuel Pressure Regulator Issues.
Possible Location: Engine Control Module, Fuel Injectors, Mass Air Flow Sensor, Throttle Body, Fuel Pressure Regulator.
How to Fix the Problem: Inspect for Vacuum Leaks, Clean or Replace Mass Air Flow Sensor, Clean or Replace Throttle Body, Replace Fuel Pressure Regulator.
How Difficult to Fix: Moderate
Can You Drive With This Code: Yes, but it is not recommended as it may lead to further damage to the engine.
How to Clear the Code: Disconnect the battery, Use an OBD-II Scanner.
Tools Need to use: OBD-II Scanner, Vacuum Gauge, Fuel Pressure Tester.


TACOMA DTC P0120:

Description: Throttle Pedal Position Sensor/Switch “A” Circuit Malfunction
Symptoms: Engine Light On, Engine Stalls, Engine Surges, Poor Engine Performance, Reduced Fuel Efficiency.
Cause: Failed Throttle Pedal Position Sensor, Wiring Issues, Connector Issues, Failed Engine Control Module.
Possible Location: Throttle Pedal Position Sensor, Wiring Harness, Connector, Engine Control Module.
How to Fix the Problem: Replace Throttle Pedal Position Sensor, Repair Wiring Issues, Repair Connector Issues, Replace Engine Control Module.
How Difficult to Fix: Moderate
Can You Drive With This Code: Yes, but it is not recommended as it may lead to further damage to the engine.
How to Clear the Code: Disconnect the battery, Use an OBD-II Scanner.
Tools Need to use: OBD-II Scanner, Multimeter.


TACOMA DTC P0300:

Description: Random/Multiple Cylinder Misfire Detected
Symptoms: Engine Light On, Engine Misfire, Engine Stalls, Engine Surges, Poor Engine Performance, Reduced Fuel Efficiency.
Cause: Failed Spark Plug, Failed Ignition Coil, Failed Fuel Injector, Failed Engine Control Module, Wiring Issues.
Possible Location: Spark Plugs, Ignition Coils, Fuel Injectors, Engine Control Module, Wiring Harness
How to Fix the Problem: Replace Failed Spark Plug, Replace Failed Ignition Coil, Replace Failed Fuel Injector, Replace Failed Engine Control Module, Repair Wiring Issues.
How Difficult to Fix: Moderate to Difficult
Can You Drive With This Code: Yes, but it is not recommended as it may lead to further damage to the engine.
How to Clear the Code: Disconnect the battery, Use an OBD-II Scanner.
Tools Need to use: OBD-II Scanner, Spark Plug Socket, Ignition Coil Socket, Fuel Injector Socket, Multimeter.

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TACOMA DTC P0304:

Description: Cylinder 4 Misfire Detected
Symptoms: Engine Light On, Engine Misfire, Engine Stalls, Engine Surges, Poor Engine Performance, Reduced Fuel Efficiency.
Cause: Failed Spark Plug, Failed Ignition Coil, Failed Fuel Injector, Failed Engine Control Module, Wiring Issues.
Possible Location: Spark Plug (Cylinder 4), Ignition Coil (Cylinder 4), Fuel Injector (Cylinder 4), Engine Control Module, Wiring Harness.
How to Fix the Problem: Replace Failed Spark Plug (Cylinder 4), Replace Failed Ignition Coil (Cylinder 4), Replace Failed Fuel Injector (Cylinder 4), Replace Failed Engine Control Module, Repair Wiring Issues.
How Difficult to Fix: Moderate
Can You Drive With This Code: Yes, but it is not recommended as it may lead to further damage to the engine.
How to Clear the Code: Disconnect the battery, Use an OBD-II Scanner.
Tools Need to use: OBD-II Scanner, Spark Plug Socket, Ignition Coil Socket, Fuel Injector Socket, Multimeter.


TACOMA DTC P0456:

Description: EVAP System Small Leak Detected
Symptoms: Engine Light On, Reduced Fuel Efficiency.
Cause: Loose Gas Cap, Failed EVAP Canister Purge Valve, Failed EVAP Vent Valve, Failed EVAP Canister.
Possible Location: Gas Cap, EVAP Canister Purge Valve, EVAP Vent Valve, EVAP Canister.
How to Fix the Problem: Tighten Gas Cap, Replace Failed EVAP Canister Purge Valve, Replace Failed EVAP Vent Valve, Replace Failed EVAP Canister.
How Difficult to Fix: Easy to Moderate
Can You Drive With This Code: Yes
How to Clear the Code: Disconnect the battery, Use an OBD-II Scanner.
Tools Need to use: OBD-II Scanner, Vacuum Gauge, Fuel Pressure Tester.


TACOMA DTC P0420:

Description: Catalyst System Efficiency Below Threshold (Bank 1)
Symptoms: Engine Light On, Engine Misfire, Poor Engine Performance, Reduced Fuel Efficiency.
Cause: Failed Catalytic Converter, Engine Misfire, Failed Oxygen Sensor, Failed Engine Control Module.
Possible Location: Catalytic Converter (Bank 1), Oxygen Sensor (Bank 1), Engine Control Module.
How to Fix the Problem: Replace Failed Catalytic Converter (Bank 1), Replace Failed Oxygen Sensor (Bank 1), Replace Failed Engine Control Module.
How Difficult to Fix: Moderate to Difficult
Can You Drive With This Code: Yes, but it is not recommended as it may lead to further damage to the engine.
How to Clear the Code: Disconnect the battery, Use an OBD-II Scanner.
Tools Need to use: OBD-II Scanner, Oxygen Sensor Socket, Catalytic Converter Socket, Multimeter.

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TACOMA DTC P0430:

Description: Catalyst System Efficiency Below Threshold (Bank 2)
Symptoms: Engine Light On, Engine Misfire, Poor Engine Performance, Reduced Fuel Efficiency.
Cause: Failed Catalytic Converter, Engine Misfire, Failed Oxygen Sensor, Failed Engine Control Module.
Possible Location: Catalytic Converter (Bank 2), Oxygen Sensor (Bank 2), Engine Control Module.
How to Fix the Problem: Replace Failed Catalytic Converter (Bank 2), Replace Failed Oxygen Sensor (Bank 2), Replace Failed Engine Control Module.
How Difficult to Fix: Moderate to Difficult
Can You Drive With This Code: Yes, but it is not recommended as it may lead to further damage to the engine.
How to Clear the Code: Disconnect the battery, Use an OBD-II Scanner.
Tools Need to use: OBD-II Scanner, Oxygen Sensor Socket, Catalytic Converter Socket, Multimeter.


TACOMA DTC P0500:

Description: Vehicle Speed Sensor “A” Circuit Malfunction
Symptoms: Engine Light On, Engine Stalls, Engine Surges, Poor Engine Performance, Reduced Fuel Efficiency, Speedometer Not Working.
Cause: Failed Vehicle Speed Sensor, Wiring Issues, Connector Issues, Failed Engine Control Module.
Possible Location: Vehicle Speed Sensor, Wiring Harness, Connector, Engine Control Module.
How to Fix the Problem: Replace Failed Vehicle Speed Sensor, Repair Wiring Issues, Repair Connector Issues, Replace Failed Engine Control Module.
How Difficult to Fix: Moderate
Can You Drive With This Code: Yes, but it is not recommended as it may lead to further damage to the engine.
How to Clear the Code: Disconnect the battery, Use an OBD-II Scanner.
Tools Need to use: OBD-II Scanner, Multimeter.


TACOMA DTC P2195:

Description: O2 Sensor Signal Stuck Lean (Bank 1 Sensor 1)
Symptoms: Engine Light On, Engine Misfire, Poor Engine Performance, Reduced Fuel Efficiency.
Cause: Failed Oxygen Sensor, Wiring Issues, Connector Issues, Failed Engine Control Module.
Possible Location: Oxygen Sensor (Bank 1 Sensor 1), Wiring Harness, Connector, Engine Control Module.
How to Fix the Problem: Replace Failed Oxygen Sensor (Bank 1 Sensor 1), Repair Wiring Issues, Repair Connector Issues, Replace Failed Engine Control Module.
How Difficult to Fix: Easy to Moderate
Can You Drive With This Code: Yes, but it is not recommended as it may lead to further damage to the engine.
How to Clear the Code: Disconnect the battery, Use an OBD-II Scanner.
Tools Need to use: OBD-II Scanner, Oxygen Sensor Socket, Multimeter.

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TACOMA DTC P2196:

Description: O2 Sensor Signal Stuck Rich (Bank 1 Sensor 1)
Symptoms: Engine Light On, Engine Misfire, Poor Engine Performance, Reduced Fuel Efficiency.
Cause: Failed Oxygen Sensor, Wiring Issues, Connector Issues, Failed Engine Control Module.
Possible Location: Oxygen Sensor (Bank 1 Sensor 1), Wiring Harness, Connector, Engine Control Module.
How to Fix the Problem: Replace Failed Oxygen Sensor (Bank 1 Sensor 1), Repair Wiring Issues, Repair Connector Issues, Replace Failed Engine Control Module.
HowDifficult to Fix: Easy to Moderate
Can You Drive With This Code: Yes, but it is not recommended as it may lead to further damage to the engine.
How to Clear the Code: Disconnect the battery, Use an OBD-II Scanner.
Tools Need to use: OBD-II Scanner, Oxygen Sensor Socket, Multimeter.


TACOMA DTC P2198:

Description: O2 Sensor Signal Stuck Lean (Bank 2 Sensor 1)
Symptoms: Engine Light On, Engine Misfire, Poor Engine Performance, Reduced Fuel Efficiency.
Cause: Failed Oxygen Sensor, Wiring Issues, Connector Issues, Failed Engine Control Module.
Possible Location: Oxygen Sensor (Bank 2 Sensor 1), Wiring Harness, Connector, Engine Control Module.
How to Fix the Problem: Replace Failed Oxygen Sensor (Bank 2 Sensor 1), Repair Wiring Issues, Repair Connector Issues, Replace Failed Engine Control Module.
How Difficult to Fix: Easy to Moderate
Can You Drive With This Code: Yes, but it is not recommended as it may lead to further damage to the engine.
How to Clear the Code: Disconnect the battery, Use an OBD-II Scanner.
Tools Need to use: OBD-II Scanner, Oxygen Sensor Socket, Multimeter.


TACOMA DTC P2197:

Description: O2 Sensor Signal Stuck Rich (Bank 2 Sensor 1)
Symptoms: Engine Light On, Engine Misfire, Poor Engine Performance, Reduced Fuel Efficiency.
Cause: Failed Oxygen Sensor, Wiring Issues, Connector Issues, Failed Engine Control Module.
Possible Location: Oxygen Sensor (Bank 2 Sensor 1), Wiring Harness, Connector, Engine Control Module.
How to Fix the Problem: Replace Failed Oxygen Sensor (Bank 2 Sensor 1), Repair Wiring Issues, Repair Connector Issues, Replace Failed Engine Control Module.
How Difficult to Fix: Easy to Moderate
Can You Drive With This Code: Yes, but it is not recommended as it may lead to further damage to the engine.
How to Clear the Code: Disconnect the battery, Use an OBD-II Scanner.
Tools Need to use: OBD-II Scanner, Oxygen Sensor Socket, Multimeter.

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TACOMA DTC P0440:

Description: EVAP System Malfunction
Symptoms: Engine Light On, Reduced Fuel Efficiency.
Cause: Failed Gas Cap, Failed EVAP Canister Purge Valve, Failed EVAP Vent Valve, Failed EVAP Canister.
Possible Location: Gas Cap, EVAP Canister Purge Valve, EVAP Vent Valve, EVAP Canister.
How to Fix the Problem: Tighten Gas Cap, Replace Failed EVAP Canister Purge Valve, Replace Failed EVAP Vent Valve, Replace Failed EVAP Canister.
How Difficult to Fix: Easy to Moderate
Can You Drive With This Code: Yes
How to Clear the Code: Disconnect the battery, Use an OBD-II Scanner.
Tools Need to use: OBD-II Scanner, Vacuum Gauge, Fuel Pressure Tester.


TACOMA DTC P0441:

Description: EVAP System Incorrect Purge Flow
Symptoms: Engine Light On, Reduced Fuel Efficiency.
Cause: Failed EVAP Canister Purge Valve, Failed EVAP Vent Valve, Failed EVAP Canister.
Possible Location: EVAP Canister Purge Valve, EVAP Vent Valve, EVAP Canister.
How to Fix the Problem: ReplaceFailed EVAP Canister Purge Valve, Replace Failed EVAP Vent Valve, Replace Failed EVAP Canister.
How Difficult to Fix: Easy to Moderate
Can You Drive With This Code: Yes
How to Clear the Code: Disconnect the battery, Use an OBD-II Scanner.
Tools Need to use: OBD-II Scanner, Vacuum Gauge, Fuel Pressure Tester.


WORDS FROM ERWIN SALARDA

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It is critical to monitor your Toyota Tacoma’s OBD system to ensure that any issues are detected and addressed as soon as possible. Regular maintenance and inspections can aid in the prevention of potential problems and the smooth operation of your vehicle. If you do encounter a DTC, this article will provide you with information on the most common codes and their solutions. Early detection and repair can help prevent further damage to your vehicle and ensure that it performs optimally.