Diagnostic Aids
WARNING: This page is about a different car, the 2009 GMC Sierra and 2009 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
- An open 125 A fuse in the manual disconnect lever may cause this DTC to set.
- The current limit resistor is rated at 12 Ω. If 11-13 Ω is measured across the HV+ connector X2 and HV- connector X3 at the positive contactor relay, the current limit relay could be stuck closed.
- A negative HV contactor relay stuck closed will not affect the precharge sequence.
- A positive HV contactor relay stuck closed will also set DTC P0ADC.
- The BECM will start a precharge wait timer after failing 2 consecutive precharge events.