P0379 – OBD-II DTC

OBD-II DTC P0379 – Timing Reference High Resolution Signal B Intermittent/Erratic Pulses

DTC P0379 meaning

DTC P0379 refers to a problem with the timing reference high-resolution signal B, indicating that the engine control module (ECM) has detected intermittent or erratic pulses from the timing reference signal. This signal is crucial for the proper timing of the engine’s ignition and fuel injection systems. When the ECM receives inconsistent data, it can lead to performance issues and may trigger the check engine light.

DTC P0379 symptoms

Common symptoms associated with DTC P0379 may include:

• Check engine light illuminated
• Engine misfires or runs rough
• Decreased engine performance
• Difficulty starting the engine
• Increased fuel consumption

DTC P0379 causes

Several factors can contribute to the occurrence of DTC P0379, including:

• Faulty crankshaft or camshaft position sensors
• Wiring issues, such as damaged or corroded connectors
• Faulty ECM or software issues
• Timing belt or chain problems
• Interference from other components or sensors

DTC P0379 seriousness

DTC P0379 can be considered serious as it affects the engine’s timing and overall performance. If left unaddressed, it may lead to more significant engine problems, reduced fuel efficiency, and potential damage to engine components. It is advisable to diagnose and repair the issue promptly to avoid further complications.

How to diagnose DTC P0379

To diagnose DTC P0379, follow these steps:

1. Use an OBD-II scanner to confirm the DTC and check for any related codes.
2. Inspect the crankshaft and camshaft position sensors for damage or wear.
3. Examine the wiring and connectors for signs of corrosion or loose connections.
4. Check the timing belt or chain for proper alignment and condition.
5. Test the ECM for proper function and software updates.

How to fix DTC P0379 step-by-step instructions

To fix DTC P0379, follow these step-by-step instructions:

1. Clear the DTC using an OBD-II scanner.
2. Inspect and replace any damaged crankshaft or camshaft position sensors.
3. Repair or replace any damaged wiring or connectors.
4. Adjust or replace the timing belt or chain if necessary.
5. Reprogram or replace the ECM if it is found to be faulty.
6. Perform a test drive to ensure the issue is resolved and the DTC does not return.

How to erase DTC P0379

To erase DTC P0379, follow these steps:

1. Connect an OBD-II scanner to the vehicle’s diagnostic port.
2. Turn on the ignition without starting the engine.
3. Navigate to the DTC menu on the scanner.
4. Select the option to clear or erase the codes.
5. Turn off the ignition and disconnect the scanner.
6. Start the engine and monitor for any reoccurrence of the DTC.

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