Chrysler DTC P1391 – Intermittent Loss of CMP or CKP
DTC P1391 meaning on Chrysler
DTC P1391 on a Chrysler vehicle indicates an Intermittent Loss of CMP (Camshaft Position) or CKP (Crankshaft Position) sensor signal. This diagnostic trouble code is specific to Chrysler vehicles and is related to the engine’s timing and fuel delivery system.
Chrysler DTC P1391 symptoms
Symptoms of DTC P1391 on a Chrysler may include:
- Engine stalling or rough idling
- Difficulty starting the engine
- Decreased engine performance
- Illumination of the Check Engine Light
Chrysler DTC P1391 causes
Common causes of DTC P1391 on a Chrysler vehicle include:
- Faulty Camshaft Position (CMP) sensor
- Faulty Crankshaft Position (CKP) sensor
- Wiring or connection issues in the sensor circuit
- Engine timing belt or chain problems
Chrysler DTC P1391 seriousness
DTC P1391 should be addressed promptly as it can lead to engine performance issues and potential drivability problems. Ignoring this code may result in further damage to engine components.
How to diagnose DTC P1391 on Chrysler
To diagnose DTC P1391 on a Chrysler vehicle, follow these steps:
- Use a scan tool to retrieve the trouble codes and freeze frame data.
- Inspect the CMP and CKP sensors for any visible damage or corrosion.
- Check the sensor wiring and connectors for loose connections or breaks.
- Perform a continuity test on the sensor circuits to check for proper electrical flow.
- Verify the engine timing is correct and inspect the timing belt or chain for wear.
How to fix DTC P1391 on Chrysler
To fix DTC P1391 on a Chrysler vehicle, consider the following actions:
- Replace the faulty Camshaft Position (CMP) sensor if found defective.
- Replace the faulty Crankshaft Position (CKP) sensor if found defective.
- Repair any damaged wiring or connectors in the sensor circuit.
- Ensure proper engine timing and replace the timing belt or chain if necessary.
How to erase DTC P1391 on Chrysler
To erase DTC P1391 on a Chrysler vehicle, use a scan tool to clear the trouble codes from the engine control module (ECM). After performing the necessary repairs, clear the codes and recheck for any recurring issues.
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