P1377 Code – Ignition Control Module Cam Ref Pulse To 4X Ref Pulse Incorrect

Code P1377 Possible Causes
4X Crankshaft Position CKP Sensor circuit poor electrical connection
4X Crankshaft Position CKP Sensor harness is open or shorted
Faulty 4X Crankshaft Position CKP Sensor
Faulty Battery or Charging system