Diagnostic Aids

WARNING: This page is about a different car, the 2010 GMC Sierra and 2010 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.

This DTC could be caused by a possible power electronics cooling system failure due to the following:

Restricted radiator air flow or coolant fans inoperative.
Restricted power electronics coolant flow or contaminated coolant.
Inoperative power electronics cooling system water pump.