Error code

OBD2 P0371

OBD2P0371
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.

What it means

Timing Reference High Resolution Signal 'A' Too Many Pulses.

Severity

moderateCan be driven, but performance and fuel efficiency will suffer. Addressing the issue is recommended.

Summary

P0371 indicates that the high-resolution timing reference signal 'A' from the crankshaft position sensor (CKP) or camshaft position sensor (CMP) has too many pulses, which can cause issues with ignition and fuel injection timing.

Symptoms

  • Hard starting or no starting
  • Poor acceleration
  • Increased fuel consumption
  • Engine misfires
  • Illuminated Check Engine Light

Common Causes

  • Sensor failure (crankshaft/camshaft position sensor)
  • Wiring issues
  • Reluctor ring damage or debris
  • Magnet issues affecting the sensor's magnetic field

Diagnosis

  1. Check for spark presence on all cylinders.
  2. Verify that fuel is being delivered to injectors.
  3. Test sensor voltage using a multimeter while cranking the engine.
  4. Inspect reluctor ring and remove any debris or damage.
  5. Ensure proper mounting of the crankshaft position sensor.

Fixes

  • Replace faulty crankshaft/camshaft position sensor.

FAQ

What causes P0371?

P0371 is typically caused by issues with the crankshaft or camshaft position sensor, wiring problems, damage to the reluctor ring, or interference with the magnetic field of the sensor.

How do I test for P0371?

Test involves checking spark presence on all cylinders, verifying fuel delivery, testing sensor voltage using a multimeter while cranking the engine, and inspecting the reluctor ring for debris or damage.

View source

Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.

More OBD2 codes

All OBD2 codes →Search more codes →