P0379 Timing Reference High Resolution Signal B Intermittent/Erratic Pulses

Understanding P0379 Error Code: Timing Reference High Resolution Signal B Intermittent/Erratic Pulses

Timing issues can be a massive headache for any driver. One moment, your engine is running smoothly, and the next moment, it’s sputtering and struggling to perform.

If you’re experiencing this issue, chances are you’ve come across the P0379 error code. This code indicates a problem with the timing reference high-resolution signal B. In this article, we will take a closer look at the P0379 error code and what it means for your vehicle.

What is the P0379 Error Code?

The P0379 error code is a diagnostic trouble code (DTC) that indicates a problem with the timing reference high-resolution signal B. It is primarily seen in diesel engines that have an electronic fuel injection system.

The signal from the camshaft position sensor is not in sync with the signal from the crankshaft position sensor. This misalignment leads to the engine’s failure to start or operates erratically.

Causes of P0379 Error Code

The P0379 error code can be caused by several issues, including:

1. Faulty Camshaft and Crankshaft Sensors: The camshaft and crankshaft sensors are responsible for sending signals to the engine control module (ECM) about the position of each shaft. A faulty sensor can send incorrect signals or no signals at all, leading to the P0379 error code.
2. Broken Timing Chain: A timing chain connects the camshaft and crankshaft and ensures they are in sync. A broken timing chain can cause the signals to be out of sync, resulting in the P0379 error code.
3. Damaged Wiring or Connectors: Any damage to the wiring or connectors associated with the camshaft or crankshaft sensors can cause the signals to be disrupted and lead to the P0379 error code.

Symptoms of P0379 Error Code

The P0379 error code can cause several symptoms, including:

1. Difficulty starting the engine or failure to start altogether.
2. Rough idling or stalling engine.
3. Reduced engine power and acceleration.
4. Engine misfires and backfires.
5. Illuminated check engine light and other warning lights on the dashboard.

How to Diagnose the P0379 Error Code?

Diagnosing the P0379 error code requires a thorough inspection of the camshaft and crankshaft sensors and related components. Here are the steps:

1. Check the Camshaft and Crankshaft Sensors: Check the sensors for any damage, wear, or corrosion. Ensure that they are correctly installed and connected.
2. Inspect the Timing Chain: Check the timing chain for any damage or wear. If found, replace it immediately.
3. Check the Wiring and Connectors: Inspect the wiring and connectors associated with the sensors. Ensure that they are in good condition and correctly connected.
4. Use OBD-II Scanner: Use an OBD-II scanner to retrieve the error codes and data from the ECM. Analyze the data to determine the root cause of the P0379 error code.

How to Fix the P0379 Error Code?

Fixing the P0379 error code involves replacing any faulty components and repairing damaged wiring and connectors. Here are the steps:

1. Replace Faulty Sensors: If any sensors are damaged, replace them immediately. Ensure that the new sensors are compatible with your vehicle.
2. Repair or Replace Damaged Wiring and Connectors: If any wiring or connectors are damaged, repair or replace them as needed.
3. Replace Timing Chain: If the timing chain is damaged, replace it immediately.
4. Clear Error Codes: Once the repairs are complete, use an OBD-II scanner to clear the error codes.

Conclusion

The P0379 error code can be frustrating for any driver to experience. By understanding the causes, symptoms, diagnosis, and fixes of this error code, you can save yourself time, money, and headaches. If you’re not confident in repairing your vehicle, it’s best to seek the help of a professional mechanic.

FAQs

1. Can I drive my vehicle with the P0379 error code?

No, you should not drive your vehicle with the P0379 error code. The engine may stall or misfire, causing a safety hazard.

2. Can a bad battery cause the P0379 error code?

No, a bad battery cannot cause the P0379 error code. The error code is primarily caused by issues with the camshaft and crankshaft sensors, timing chain, or wiring and connectors.

3. How long does it take to fix the P0379 error code?

The time it takes to fix the P0379 error code varies depending on the root cause of the issue. If it’s a simple fix like replacing a sensor, it may take only a few hours. However, if it’s a more complex issue like a broken timing chain, it may take up to a day or more.

4. Can the P0379 error code come back after repairs?

Yes, the P0379 error code can come back after repairs if the root cause of the issue was not correctly diagnosed and fixed.

5. How much does it cost to fix the P0379 error code?

The cost of fixing the P0379 error code varies depending on the root cause of the issue. If it’s a simple fix, it may cost less than $100. However, if it’s a more complex issue like a broken timing chain, it may cost up to $1,000.