The TOP 14 OBD DTC Code of Toyota Sienna
Do you have Toyota Sienna, These are the most common Diagnostic trouble code of your Toyota Sienna, P0420, P0430, P0300, P0352, P0328, P0012, P2419, P2402, B2261, B1150, B0111, C1201, U2100 andU0126.
Toyota Sienna is a popular minivan that is equipped with On-Board Diagnostic (OBD) system to monitor and report any issues related to its performance. OBD system generates Diagnostic Trouble Codes (DTC) whenever it detects a problem in the vehicle. Understanding the DTC codes of your Toyota Sienna is crucial in identifying the root cause of any problems that may arise. In this article, we will discuss the TOP 14 OBD DTC codes of Toyota Sienna that you should know as a Sienna owner.
TOP 14 DTC’s
Toyota Sienna DTC P0420:
Description: The P0420 code indicates that the catalytic converter efficiency is below the threshold set by the manufacturer.
Symptoms: Possible symptoms of a P0420 code include a decrease in fuel efficiency, a decrease in power, a check engine light, and a possible decrease in acceleration.
Cause: There are several potential causes of a P0420 code, including a malfunctioning oxygen sensor, a damaged catalytic converter, and a clogged air filter.
Possible Location: The catalytic converter is typically located in the exhaust system.
How to Fix the Problem: To diagnose and fix a P0420 code, a mechanic may inspect the oxygen sensors, catalytic converter, and air filter. If a malfunctioning oxygen sensor is found, it should be replaced. If the catalytic converter is damaged, it may need to be replaced. If the air filter is clogged, it should be replaced.
How Difficult to Fix: The difficulty of fixing a P0420 code can vary depending on the root cause of the problem. If the cause is a simple clogged air filter, the fix is relatively easy. However, if the cause is a damaged catalytic converter, the fix can be more difficult and expensive.
Can You Drive With This Code: Yes, you can still drive your vehicle with this code, but it is recommended to have it fixed as soon as possible to avoid further damage to the engine and emissions system.
How to Clear the Code: The code can be cleared by disconnecting the battery or using an OBD-II scan tool to erase the codes stored in the engine control module.
Tools Need to use: An OBD-II scan tool and a diagnostic tool may be needed to diagnose and fix a P0420 code.
Toyota Sienna DTC P0430:
Description: The P0430 code indicates that the catalytic converter efficiency is below the threshold set by the manufacturer for the rear bank of cylinders.
Symptoms: Possible symptoms of a P0430 code include a decrease in fuel efficiency, a decrease in power, a check engine light, and a possible decrease in acceleration.
Cause: There are several potential causes of a P0430 code, including a malfunctioning oxygen sensor, a damaged catalytic converter, and a clogged air filter.
Possible Location: The catalytic converter is typically located in the exhaust system.
How to Fix the Problem: To diagnose and fix a P0430 code, a mechanic may inspect the oxygen sensors, catalytic converter, and air filter. If a malfunctioning oxygen sensor is found, it should be replaced. If the catalytic converter is damaged, it may need to be replaced. If the air filter is clogged, it should be replaced.
How Difficult to Fix: The difficulty of fixing a P0430 code can vary depending on the root cause of the problem. If the cause is a simple clogged air filter, the fix is relatively easy. However, if the cause is a damaged catalytic converter, the fix can be more difficult and expensive.
Can You Drive With This Code: Yes, you can still drive your vehicle with this code, but it is recommended to have it fixed as soon as possible to avoid further damage to the engine and emissions system.
How to Clear the Code: The code can be cleared by disconnecting the battery or using an OBD-II scan tool to erase the codes stored in the engine control module.
Tools Need to use: An OBD-II scan tool and a diagnostic tool may be needed to diagnose and fix a P0430 code.
Toyota Sienna DTC P0300:
Description: The P0300 code indicates that multiple cylinders are misfiring.
Symptoms: Possible symptoms of a P0300 code include a rough idle, a decrease in power, a decrease in fuel efficiency, a check engine light, and a possible decrease in acceleration.
Cause: There are several potential causes of a P0300 code, including a malfunctioning spark plug, a damaged ignition coil, a clogged fuel injector, and a vacuum leak.
Possible Location: The cause of the misfire can be located in the ignition system or fuel system.
How to Fix the Problem: To diagnose and fix a P0300 code, a mechanic may inspect the spark plugs, ignition coils, fuel injectors, and vacuum system. If a malfunctioning spark plug is found, it should be replaced. If a damaged ignition coil is found, it should be replaced. If a clogged fuel injector is found, it should be cleaned or replaced. If a vacuum leak is found, it should be repaired.
How Difficult to Fix: The difficulty of fixing a P0300 code can vary depending on the root cause of the problem. If the cause is a simple spark plug replacement, the fix is relatively easy. However, if the cause is a vacuum leak, the fix can be more difficult and time-consuming.
Can You Drive With This Code: Yes, you can still drive your vehicle with this code, but it is recommended to have it fixed as soon as possible to avoid further damage to the engine and to improve the vehicle’s performance.
How to Clear the Code: The code can be cleared by disconnecting the battery or using an OBD-II scan tool to erase the codes stored in the engine control module.
Tools Need to use: An OBD-II scan tool and a diagnostic tool may be needed to diagnose and fix a P0300 code.
Toyota Sienna DTC P0352:
Description: The P0352 code indicates that there is a malfunction in the ignition coil “B” circuit.
Symptoms: Possible symptoms of a P0352 code include a misfire, a rough idle, a decrease in power, a check engine light, and a possible decrease in fuel efficiency.
Cause: There are several potential causes of a P0352 code, including a faulty ignition coil, a damaged spark plug, a damaged spark plug wire, and a damaged spark plug connector.
Possible Location: The ignition coil “B” is typically located in the engine compartment.
How to Fix the Problem: To diagnose and fix a P0352 code, a mechanic may inspect the ignition coil, spark plug, spark plug wire, and spark plug connector. If a faulty ignition coil is found, it should be replaced. If a damaged spark plug, spark plug wire, or spark plug connector is found, it should be replaced.
How Difficult to Fix: The difficulty of fixing a P0352 code can vary depending on the root cause of the problem. If the cause is a simple spark plug replacement, the fix is relatively easy. However, if the cause is a damaged ignition coil, the fix can be more difficult and time-consuming.
Can You Drive With This Code: Yes, you can still drive your vehicle with this code, but it is recommended to have it fixed as soon as possible to avoid further damage to the engine and to improve the vehicle’s performance.
How to Clear the Code: The code can be cleared by disconnecting the battery or using an OBD-II scan tool to erase the codes stored in the engine control module.
Tools Need to use: An OBD-II scan tool and a diagnostic tool may be needed to diagnose and fix a P0352 code.
Toyota Sienna DTC P0328:
Description: The P0328 code indicates that the knock sensor circuit is high.
Symptoms: Possible symptoms of a P0328 code include a decrease in power, a rough idle, a check engine light, and a possible decrease in fuel efficiency.
Cause: There are several potential causes of a P0328 code, including a faulty knock sensor, a damaged wiring harness, and a damaged knock sensor circuit.
Possible Location: The knock sensor is typically located on the engine block.
How to Fix the Problem: To diagnose and fix a P0328 code, a mechanic may inspect the knock sensor, wiring harness, and knock sensor circuit. If a faulty knock sensor is found, it should be replaced. If a damaged wiring harness or knock sensor circuit is found, it should be repaired.
How Difficult to Fix: The difficulty of fixing a P0328 code can vary depending on the root cause of the problem. If the cause is a simple knock sensor replacement, the fix is relatively easy. However, if the cause is a damaged wiring harness or knock sensor circuit, the fix can be more difficult and time-consuming.
Can You Drive With This Code: Yes, you can still drive your vehicle with this code, but it is recommended to have it fixed as soon as possible to avoid further damage to the engine and to improve the vehicle’s performance.
How to Clear the Code: The code can be cleared by disconnecting the battery or using an OBD-II scan tool to erase the codes stored in the engine control module.
Tools Need to use: An OBD-II scan tool and a diagnostic tool may be needed to diagnose and fix a P0328 code.
Toyota Sienna DTC P0012:
Description: The P0012 code indicates that the camshaft position (CMP) timing is over-retarded on bank 1.
Symptoms: Possible symptoms of a P0012 code include a rough idle, a decrease in power, a check engine light, and a possible decrease in fuel efficiency.
Cause: There are several potential causes of a P0012 code, including a faulty camshaft position sensor, a damaged timing chain or belt, and a damaged oil control valve.
Possible Location: The camshaft position sensor is typically located near the camshaft or on the cylinder head.
How to Fix the Problem: To diagnose and fix a P0012 code, a mechanic may inspect the camshaft position sensor, timing chain or belt, and oil control valve. If a faulty camshaft position sensor is found, it should be replaced. If a damaged timing chain or belt is found, it should be replaced. If a damaged oil control valve is found, it should be replaced.
How Difficult to Fix: The difficulty of fixing a P0012 code can vary depending on the root cause of the problem. If the cause is a simple camshaft position sensor replacement, the fix is relatively easy. However, if the cause is a damaged timing chain or belt, the fix can be more difficult and time-consuming.
Can You Drive With This Code: Yes, you can still drive your vehicle with this code, but it is recommended to have it fixed as soon as possible to avoid further damage to the engine and to improve the vehicle’s performance.
How to Clear the Code: The code can be cleared by disconnecting the battery or using an OBD-II scan tool to erase the codes stored in the engine control module.
Tools Need to use: An OBD-II scan tool and a diagnostic tool may be needed to diagnose and fix a P0012 code.
Toyota Sienna DTC P2419:
Description: The P2419 code indicates a problem with the secondary air injection system switching valve “B” circuit.
Symptoms: Possible symptoms of a P2419 code include a check engine light, decreased fuel efficiency, and decreased engine performance.
Cause: There are several potential causes of a P2419 code, including a faulty secondary air injection switching valve, a damaged wiring harness, and a damaged air pump.
Possible Location: The secondary air injection switching valve is typically located in the engine compartment.
How to Fix the Problem: To diagnose and fix a P2419 code, a mechanic may inspect the secondary air injection switching valve, wiring harness, and air pump. If a faulty switching valve is found, it should be replaced. If a damaged wiring harness is found, it should be repaired. If a damaged air pump is found, it should be replaced.
How Difficult to Fix: The difficulty of fixing a P2419 code can vary depending on the root cause of the problem. If the cause is a simple switching valve replacement, the fix is relatively easy. However, if the cause is a damaged air pump, the fix can be more difficult and time-consuming.
Can You Drive With This Code: Yes, you can still drive your vehicle with this code, but it is recommended to have it fixed as soon as possible to avoid further damage to the engine and emissions system.
How to Clear the Code: The code can be cleared by disconnecting the battery or using an OBD-II scan tool to erase the codes stored in the engine control module.
Tools Need to use: An OBD-II scan tool and a diagnostic tool may be needed to diagnose and fix a P2419 code.
Toyota Sienna DTC P2402:
Description: The P2402 code indicates a problem with the evaporative emission control system leak detection pump control circuit.
Symptoms: Possible symptoms of a P2402 code include a check engine light and a failed emissions test.
Cause: There are several potential causes of a P2402 code, including a faulty evaporative emission control system leak detection pump, a damaged wiring harness, and a damaged pump control circuit.
Possible Location: The evaporative emission control system leak detection pump is typically located in the fuel tank.
How to Fix the Problem: To diagnose and fix a P2402 code, a mechanic may inspect the evaporative emission control system leak detection pump, wiring harness, and pump control circuit. If a faulty pump is found, it should be replaced. If a damaged wiring harness is found, it should be repaired. If a damaged pump control circuit is found, it should be repaired.
How Difficult to Fix: The difficulty of fixing a P2402 code can vary depending on the root cause of the problem. If the cause is a simple pump replacement, the fix is relatively easy. However, if the cause is a damaged wiring harness or pump control circuit, the fix can be more difficult and time-consuming.
Can You Drive With This Code: Yes, you can still drive your vehicle with this code, but it is recommended to have it fixed as soon as possible to avoid further damage to the engine and emissions system.
How to Clear the Code: The code can be cleared by disconnecting the battery or using an OBD-II scan tool to erase the codes stored in the engine control module.
Tools Need to use: An OBD-II scan tool and a diagnostic tool may be needed to diagnose and fix a P2402 code.
Toyota Sienna DTC B2261:
Description: The B2261 code indicates a problem with the keyless entry system.
Symptoms: Possible symptoms of a B2261 code include a malfunctioning keyless entry system, difficulty starting the vehicle, and a warning light on the dashboard.
Cause: There are several potential causes of a B2261 code, including a faulty keyless entry module, a damaged key fob, a damaged wiring harness, and a damaged antenna.
Possible Location: The keyless entry module and antenna are typically located near the steering column or in the vehicle’s interior.
How to Fix the Problem: To diagnose and fix a B2261 code, a mechanic may inspect the keyless entry module, key fob, wiring harness, and antenna. If a faulty keyless entry module is found, it should be replaced. If a damaged key fob is found, it should be replaced. If a damaged wiring harness is found, it should be repaired. If a damaged antenna is found, it should be replaced.
How Difficult to Fix: The difficulty of fixing a B2261 code can vary depending on the root cause of the problem. If the cause is a simple key fob replacement, the fix is relatively easy. However, if the cause is a damaged wiring harness or antenna, the fix can be more difficult and time-consuming.
Can You Drive With This Code: Yes, you can still drive your vehicle with this code, but it may affect the functionality of the keyless entry system.
How to Clear the Code: The code can be cleared by disconnecting the battery or using an OBD-II scan tool to erase the codes stored in the engine control module.
Tools Need to use: An OBD-II scan tool and a diagnostic tool may be needed to diagnose and fix a B2261 code.
Toyota Sienna DTC B1150:
Description: The B1150 code indicates a problem with the driver’s seat position sensor circuit.
Symptoms: Possible symptoms of a B1150 code include a malfunctioning driver’s seat, a warning light on the dashboard, and a possible failure of the airbag system.
Cause: There are several potential causes of a B1150 code, including a faulty driver’s seat position sensor, a damaged wiring harness, and a damaged airbag control module.
Possible Location: The driver’s seat position sensor is typically located in the driver’s seat.
How to Fix the Problem: To diagnose and fix a B1150 code, a mechanic may inspect the driver’s seat position sensor, wiring harness, and airbag control module. If a faulty seat position sensor is found, it should be replaced. If a damaged wiring harness is found, it should be repaired. If a damaged airbag control module is found, it should be replaced.
How Difficult to Fix: The difficulty of fixing a B1150 code can vary depending on the root cause of the problem. If the cause is a simple seat position sensor replacement, the fix is relatively easy. However, if the cause is a damaged wiring harness or airbag control module, the fix can be more difficult and time-consuming.
Can You Drive With This Code: Yes, you can still drive your vehicle with this code, but it may affect the functionality of the driver’s seat and airbag system.
How to Clear the Code: The code can be cleared by disconnecting the battery or using an OBD-II scan tool to erase the codes stored in the engine control module.
Tools Need to use: An OBD-II scan tool and a diagnostic tool may be needed to diagnose and fix a B1150 code.
Toyota Sienna DTC B0111:
Description: The B0111 code indicates a problem with the sensor reference voltage “A” circuit.
Symptoms: Possible symptoms of a B0111 code include a malfunctioning sensor, a warning light on the dashboard, and a possible decrease in engine performance.
Cause: There are several potential causes of a B0111 code, including a faulty sensor, a damaged wiring harness, and a damaged sensor reference voltage circuit.
Possible Location: The sensor and its reference voltage circuit are typically located in the engine compartment.
How to Fix the Problem: To diagnose and fix a B0111 code, a mechanic may inspect the sensor, wiring harness, and sensor reference voltage circuit. If a faulty sensor is found, it should be replaced. If a damaged wiring harness is found, it should be repaired. If a damaged sensor reference voltage circuit is found, it should be repaired.
How Difficult to Fix: The difficulty of fixing a B0111 code can vary depending on the root cause of the problem. If the cause is a simple sensor replacement, the fix is relatively easy. However, if the cause is a damaged wiring harness or sensor reference voltage circuit, the fix can be more difficult and time-consuming.
Can You Drive With This Code: Yes, you can still drive your vehicle with this code, but it is recommended to have it fixed as soon as possible to avoid further damage to the engine and to improve the vehicle’s performance.
How to Clear the Code: The code can be cleared by disconnecting the battery or using an OBD-II scan tool to erase the codes stored in the engine control module.
Tools Need to use: An OBD-II scan tool and a diagnostic tool may be needed to diagnose and fix a B0111 code.
Toyota Sienna DTC C1201:
Description: The C1201 code indicates a problem with the Engine Control Module (ECM) internal circuit.
Symptoms: Possible symptoms of a C1201 code include a malfunctioning engine, a warning light on the dashboard, and a possible loss of power.
Cause: There are several potential causes of a C1201 code, including a damaged Engine Control Module, a damaged wiring harness, and a damaged internal circuit.
Possible Location: The Engine Control Module is typically located in the engine compartment.
How to Fix the Problem: To diagnose and fix a C1201 code, a mechanic may inspect the Engine Control Module, wiring harness, and internal circuit. If a damaged Engine Control Module is found, it should be replaced. If a damaged wiring harness is found, it should be repaired. If a damaged internal circuit is found, it should be repaired.
How Difficult to Fix: The difficulty of fixing a C1201 code can vary depending on the root cause of the problem. If the cause is a simple Engine Control Module replacement, the fix is relatively easy. However, if the cause is a damaged wiring harness or internal circuit, the fix can be more difficult and time-consuming.
Can You Drive With This Code: No, it is not safe to drive your vehicle with this code as it may affect the functionality of the engine.
How to Clear the Code: The code can be cleared by disconnecting the battery or using an OBD-II scan tool to erase the codes stored in the engine control module.
Tools Need to use: An OBD-II scan tool and a diagnostic tool may be needed to diagnose and fix a C1201 code.
Toyota Sienna DTC U2100:
Description: The U2100 code indicates a problem with the communication bus within the vehicle’s onboard network.
Symptoms: Possible symptoms of a U2100 code include a malfunctioning onboard network, a warning light on the dashboard, and a possible loss of power.
Cause: There are several potential causes of a U2100 code, including a damaged communication bus, a damaged wiring harness, and a damaged onboard network control module.
Possible Location: The communication bus and onboard network control module are typically located within the vehicle’s interior.
How to Fix the Problem: To diagnose and fix a U2100 code, a mechanic may inspect the communication bus, wiring harness, and onboard network control module. If a damaged communication bus is found, it should be repaired. If a damaged wiring harness is found, it should be repaired. If a damaged onboard network control module is found, it should be replaced.
How Difficult to Fix: The difficulty of fixing a U2100 code can vary depending on the root cause of the problem. If the cause is a simple communication bus repair, the fix is relatively easy. However, if the cause is a damaged wiring harness or onboard network control module, the fix can be more difficult and time-consuming.
Can You Drive With This Code: No, it is not safe to drive your vehicle with this code as it may affect the functionality of the onboard network.
How to Clear the Code: The code can be cleared by disconnecting the battery or using an OBD-II scan tool to erase the codes stored in the engine control module.
Tools Need to use: An OBD-II scan tool and a diagnostic tool may be needed to diagnose and fix a U2100 code.
Toyota Sienna DTC U0126:
Description: The U0126 code indicates a problem with the communicationbus between the Engine Control Module (ECM) and the Transmission Control Module (TCM).
Symptoms: Possible symptoms of a U0126 code include a malfunctioning transmission, a warning light on the dashboard, and a possible loss of power.
Cause: There are several potential causes of a U0126 code, including a damaged communication bus, a damaged wiring harness, and a damaged Engine Control Module or Transmission Control Module.
Possible Location: The communication bus and Engine Control Module and Transmission Control Module are typically located in the engine compartment.
How to Fix the Problem: To diagnose and fix a U0126 code, a mechanic may inspect the communication bus, wiring harness, and Engine Control Module and Transmission Control Module. If a damaged communication bus is found, it should be repaired. If a damaged wiring harness is found, it should be repaired. If a damaged Engine Control Module or Transmission Control Module is found, it should be replaced.
How Difficult to Fix: The difficulty of fixing a U0126 code can vary depending on the root cause of the problem. If the cause is a simple communication bus repair, the fix is relatively easy. However, if the cause is a damaged wiring harness or Engine Control Module or Transmission Control Module, the fix can be more difficult and time-consuming.
Can You Drive With This Code: No, it is not safe to drive your vehicle with this code as it may affect the functionality of the transmission.
How to Clear the Code: The code can be cleared by disconnecting the battery or using an OBD-II scan tool to erase the codes stored in the engine control module.
Tools Need to use: An OBD-II scan tool and a diagnostic tool may be needed to diagnose and fix a U0126 code.
WORDS FROM ERWIN SALARDA
having knowledge about the common OBD DTC codes of your Toyota Sienna can save you time and money when it comes to diagnosing and repairing any problems. It is important to note that while some codes can be easy to fix, others may require professional assistance. Regular maintenance and servicing of your vehicle can also prevent many issues from arising in the first place. Make sure to keep your vehicle manual handy and always seek professional help if you are unsure about the DTC codes or how to fix any related issues.