P0371 – Timing Reference High Resolution Signal A Too Many Pulses

Definition: This code indicates that the Engine Control Module (ECM) has detected an excessive number of pulses from the high-resolution timing reference signal “A” beyond the expected range.

p0371 – Timing Reference High Resolution Signal A Too Many Pulses

Typical Severity: Moderate

Common Causes

P0371 – Timing reference high resolution signal A too many pulses

• Common causes:
  • Faulty crankshaft position sensor
  • Timing belt or chain misalignment
  • Engine timing off
  • Wiring issues in the circuit of the crankshaft position sensor

 

Common Misdiagnosis

OBD2 Code: P0371

Description: Timing Reference High Resolution Signal A Too Many Pulses

Common Misdiagnosis: Replacing the crankshaft position sensor without checking for wiring issues or problems with the reluctor ring.

 

Common Diagnostic Steps

OBD2 Code: P0371

Description: Timing Reference High Resolution Signal A Too Many Pulses

Common Diagnostic Steps:

• Inspect the crankshaft position sensor and its wiring for damage or loose connections.
• Check for any signs of corrosion or wear on the sensor connector pins.
• Test the crankshaft position sensor using a multimeter to ensure it is functioning properly.
• Examine the timing chain/belt for proper alignment and tension.
• Verify that the engine control module (ECM) software is up-to-date.
• Use an oscilloscope to check the signal waveform from the crankshaft position sensor.
• If necessary, replace faulty components such as the crankshaft position sensor or ECM.