Jeep DTC P1391 – Intermittent Loss of CMP or CKP
DTC P1391 meaning on Jeep
DTC P1391 on a Jeep indicates an Intermittent Loss of CMP (Camshaft Position) or CKP (Crankshaft Position) sensor signal. This fault code is specific to the relationship between the camshaft and crankshaft position sensors.
Jeep DTC P1391 symptoms
- Intermittent stalling or rough idling
- Engine misfires
- Difficulty starting the engine
- Reduced engine performance
Jeep DTC P1391 causes
- Wiring or connector issues in the CMP or CKP sensor circuits
- Failed CMP or CKP sensor
- Timing belt or chain alignment problems
- Engine mechanical issues affecting sensor operation
Jeep DTC P1391 seriousness
The DTC P1391 in a Jeep should not be ignored as it can lead to drivability issues and potential engine damage if left unresolved. It is important to address this fault code promptly to ensure proper engine operation.
How to diagnose DTC P1391 on Jeep
- Inspect the wiring and connectors related to the CMP and CKP sensors for damage or corrosion.
- Check the sensor readings using a diagnostic scan tool to verify proper operation.
- Perform a visual inspection of the timing belt or chain alignment.
- Conduct a thorough inspection of the engine components that could affect sensor performance.
How to fix DTC P1391 on Jeep
- Repair or replace any damaged wiring or connectors in the CMP and CKP sensor circuits.
- Replace the faulty CMP or CKP sensor if necessary.
- Adjust or replace the timing belt or chain if misalignment is detected.
- Address any underlying engine mechanical issues that may be affecting sensor operation.
How to erase DTC P1391 on Jeep
To clear the DTC P1391 code on a Jeep, you can use a diagnostic scan tool to reset the fault codes stored in the vehicle’s computer. Once the issue has been addressed and fixed, clearing the code will turn off the Check Engine Light.
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