Question

What is p1377 fault code for Cadillac DeVille V8 Northstar?

Answer 1

Hi there,

This code is for the Ignition control module ref ulse to 4X ref pulse incorrect.

Basically put, this indicates there is a problem with the crank sensor on the car. It could also be an issue with the wiring harness to the crank sensor or a problem with the pcm

Answer 2

P1377 CADILLAC - Ignition Control Module Cam Ref Pulse To 4X Ref Pulse Incorrect

Read more: https://www.autocodes.com/p1377_cadillac.html