P1335critical severityPowertrain

Crankshaft Position Sensor REF

on 2002 Infiniti QX4 3.5L V6 · RWD

What this code means

CKP REF signal not detected during first seconds of cranking.

Symptoms

  • CEL
  • No-start
  • Cranks but no start
  • Intermittent stalling

Common causes

  • Faulty CKP sensor
  • Damaged wiring
  • Weak battery
  • Excessive air gap

Diagnostic steps

  1. Test CKP signal during crank
  2. Check wiring
  3. Test battery
  4. Check air gap

Repair notes

Replace CKP sensor.

Other Powertrain codes on this vehicle

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