P1377 Cadillac Code Description
The P1377 Cadillac code indicates a problem with the ignition control module (ICM) related to the camshaft position sensor and the crankshaft position sensor. The code specifically indicates an incorrect relationship between the cam reference pulse and the 4X reference pulse, which are crucial signals for engine ignition timing and fuel delivery. This issue can lead to misfires, rough idling, decreased fuel efficiency, and poor overall engine performance.
Common Causes of P1377 Cadillac Code
NOTE: The listed causes may not be a complete list of all potential problems, and there may be other causes.
- Faulty ignition control module
- Damaged camshaft position sensor
- Wiring or connection issues between the sensors and the ICM
- Engine mechanical problems affecting sensor signals
- Improperly installed or incompatible components
Symptoms of P1377 Cadillac
- Rough idling or stalling
- Misfires or hesitation during acceleration
- Decreased fuel efficiency
- Engine performance issues
- Illuminated check engine light
How to Fix P1377 Cadillac Code
- Diagnose the specific cause of the problem using a scan tool to read the code and perform additional tests on the ICM, camshaft sensor, and crankshaft sensor.
- Replace the ignition control module if it is found to be faulty, ensuring the new module is compatible with the vehicle’s make and model.
- Inspect and potentially replace the camshaft position sensor if it is damaged or not functioning correctly.
- Check the wiring and connections between the sensors and the ICM for any damage or corrosion, and repair or replace as necessary.
- Clear the diagnostic codes, reset the engine control module, and test the vehicle to ensure the issue has been resolved.