DTC C128B GMC
Ignition Coil Power Output Stage 3 Short to Ground
Ignition Coil Power Output Stage 3 Short to Ground
Description
Key on or Engine started, battery voltage at least 11.5v, all electrical components off, ground connections between engine and chassis well connected, and the ECM detected the voltage of the ignition coil was outside the designed parameters.
Video Guide
Diagnostic Info
- DTC Code: C128B
- Brand: GMC