DTC P0128 Hummer
Lost Communication With Starter Generator Control Module (SGCM)
Lost Communication With Starter Generator Control Module (SGCM)
Description
Voltage supplied to the modules is in the normal operating voltage range.
Cause and Solution
A poor connection or terminal tension at a GMLAN moduleAn intermittent open on either high speed GMLAN serial data circuitAn open voltage or ground circuit to a moduleAn internal module
Video Guide
Diagnostic Info
- DTC Code: P0128
- Brand: Hummer