P1391 – Dodge DTC

Dodge DTC P1391 – Intermittent Loss of CMP or CKP

DTC P1391 meaning on Dodge

DTC P1391 on Dodge 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.

Dodge DTC P1391 symptoms

• Intermittent engine stalling or rough idling
• Difficulty starting the engine
• Decreased engine performance
• Illumination of the Check Engine Light

Dodge DTC P1391 causes

• Wiring or connector issues in the CMP or CKP sensor circuits
• Defective CMP or CKP sensor
• Timing belt or chain alignment problems
• Engine mechanical issues affecting sensor operation

Dodge DTC P1391 seriousness

The DTC P1391 can lead to drivability issues and potential engine damage if left unresolved. Ignoring this fault code may result in further complications and increased repair costs.

How to diagnose DTC P1391 on Dodge

1. Use a scan tool to retrieve the fault code and freeze frame data
2. Inspect the CMP and CKP sensor wiring and connectors for damage or corrosion
3. Check the sensor resistance and signal output using a multimeter
4. Verify the timing belt or chain alignment
5. Perform a visual inspection of the engine components related to sensor operation

How to fix DTC P1391 on Dodge

1. Repair or replace damaged wiring or connectors in the sensor circuits
2. Replace the faulty CMP or CKP sensor
3. Adjust or replace the timing belt or chain if misaligned
4. Address any underlying engine mechanical issues affecting sensor operation

How to erase DTC P1391 on Dodge

1. After completing the necessary repairs, use a scan tool to clear the fault code
2. Start the engine and ensure the Check Engine Light is no longer illuminated
3. Perform a road test to confirm the issue has been resolved

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