CMP or CKP Signal Intermittent Condition
Table of contents
P1391 JEEP 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.
How do I fix code P1391 JEEP?
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins.
Tech Notes
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Cost of diagnosing the P1391 JEEP code
The cost of diagnosing the P1391 JEEP code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- Lack/Loss of Power
- The engine may be harder to start
- The engine may stumble or stall
P1391 JEEP Description
The Powertrain Control Module (PCM) monitors the Camshaft Position Sensor (CMP) Or Crankshaft Position Sensor (CKP) Signal. The Diagnostic Trouble Code (DTC) will set when the PCM detects the actual Camshaft Position Sensor position disagreed with the expected Camshaft Position Sensor level.