For Shop Owners

P1391 JEEP - CMP or CKP Signal Intermittent Condition

Repair Importance Level: 3/3
Repair Difficulty Level: 2/3 What does this mean?

Possible causes

  • Faulty Crankshaft Position Sensor (CKP)
  • Crankshaft Position Sensor (CKP) harness is open or shorted
  • Crankshaft Position Sensor (CKP) circuit poor electrical connection
  • Timing belt or chain stretched or jumped
  • Faulty Camshaft Position (CMP) Sensor
  • Camshaft Position (CMP) Sensor harness is open or shorted
  • Camshaft Position (CMP) Sensor circuit poor electrical connection.
What does this mean?

Tech notes









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What does this mean?