P0371 Fault Code

Timing Reference High Resolution Signal A Too Many Pulses

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

The P0371 fault code indicates an issue with the vehicle's timing reference high-resolution signal A. This signal is crucial for the engine control unit (ECU) to accurately determine the engine's position and timing. When the ECU detects too many pulses from this signal, it triggers the P0371 code, indicating a potential malfunction in the timing system.

• The timing reference high-resolution signal A is derived from the crankshaft or camshaft position sensors.
• This signal plays a vital role in maintaining engine performance and efficiency.
• Efficient operation relies on precise timing, and any irregularities can affect drivability.

What are the symptoms of the P0371 code?

Drivers may experience various symptoms if the P0371 fault code is triggered:

• Engine misfires or rough idling due to improper timing.
• Decreased engine power and acceleration.
• Stalling or hesitation during acceleration.
• Illuminated check engine light indicating a fault has been detected.

What causes the P0371 code?

Several issues can lead to the P0371 fault code:

• Faulty crankshaft or camshaft position sensors that generate erratic signals.
• Wiring issues, such as frayed or corroded connectors, affecting signal transmission.
• Problems with the timing belt or chain, causing incorrect alignment of engine components.
• Problems with the engine control unit (ECU) that lead to misinterpretation of the sensor signals.

How to fix P0371?

To resolve the P0371 fault code, a thorough diagnostic process is necessary:

• Inspect the crankshaft and camshaft position sensors for faults or irregular signals.
• Check the wiring and connectors for any signs of damage or corrosion.
• Ensure that the timing belt or chain is in good condition and properly aligned.
• If necessary, replace faulty components and clear the fault code to see if it returns.