P0376 Fault Code

Timing Reference High Resolution Signal B Too Many Pulses

• What does that mean?
• Symptoms
• Causes
• Solutions

The P0376 fault code indicates an issue with the timing reference high resolution signal B, where the engine control module (ECM) detects too many pulses from the crankshaft or camshaft position sensors. This typically relates to the trigger signals used to synchronize the engine's firing sequence.

What are the symptoms of the P0376 code?

Symptoms of the P0376 error may include:

• Check engine light activated on the dashboard
• Rough idling or engine misfires
• Decreased engine performance and acceleration
• Stalling or difficulty starting the engine
• Increased emissions or failure of emissions tests

What causes the P0376 code?

Potential causes of this fault code include:

• Faulty crankshaft or camshaft position sensors
• Damaged or corroded wiring and connectors in the signal circuit
• Incorrect timing belt or chain installation
• Engine misfire or timing issues
• Problems with the ECM itself or its programming

How to fix P0376?

To resolve the P0376 fault code, follow these steps:

• Inspect and test the crankshaft and camshaft position sensors for proper operation.
• Check the wiring and connectors for continuity and signs of damage.
• Verify the timing belt or chain alignment and make adjustments if necessary.
• Clear the fault code and perform a road test to see if the code reappears, indicating a persistent issue.
• If the issue persists, consider reprogramming or replacing the ECM as a last resort.