P0379 Code - Timing Reference High Resolution Signal 'B' No Pulses
Quick Answer
The OBD-II trouble code P0379 indicates that the Engine Control Module (ECM) has detected a lack of pulses in the high-resolution signal 'B' from the camshaft position sensor. Common causes include Faulty camshaft position sensor, Damaged wiring or connectors related to the sensor, Issues with the ECM. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P0379 indicates Timing Reference High Resolution Signal 'B' No Pulses.
- Common causes
- Common causes include Faulty camshaft position sensor, Damaged wiring or connectors related to the sensor, Issues with the ECM.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
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Code P0379 Description
The OBD-II trouble code P0379 indicates that the Engine Control Module (ECM) has detected a lack of pulses in the high-resolution signal 'B' from the camshaft position sensor. This signal is crucial for the ECM to accurately determine the position of the camshaft in relation to the crankshaft, allowing for proper fuel injection timing and ignition timing. When this signal is missing or inconsistent, it can lead to a variety of performance issues in the vehicle.
Common Causes of P0379
- Faulty camshaft position sensor
- Damaged wiring or connectors related to the sensor
- Issues with the ECM
- Mechanical problems with the camshaft
- Incorrect installation of the camshaft position sensor
Symptoms of P0379
- Engine misfires or runs rough
- Difficulty starting the engine
- Reduced power and acceleration
- Engine stalling while driving
- Illumination of the Check Engine Light
How to Fix P0379
- Use an OBD-II scanner to confirm the P0379 code and identify the specific cause of the issue.
- Inspect the camshaft position sensor, wiring, and connectors for any damage or corrosion. Replace or repair as necessary.
- Check the ECM for any faults or errors and reprogram if needed.
- Verify the mechanical condition of the camshaft and ensure proper alignment.
- Clear the trouble code from the ECM and test drive the vehicle to confirm that the issue has been resolved.
Cost to Fix P0379
The cost of repairing a P0379 code can vary depending on the specific cause of the issue and the labor rates in your area. On average, you can expect to pay between $100 and $300 for parts and labor. However, it's important to note that diagnostic time and labor rates at auto repair shops can vary significantly, so it's advisable to check with local shops for a more accurate estimate. Additionally, the cost may be higher if the camshaft position sensor or ECM needs to be replaced.
When is the Code Detected?
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Code P0379 Information for Specific Makes
- P0379 Mercedes-Benz — Timing Reference High Resolution Signal 'B' No Pulses
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