Diagnostic Aids
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2003 Pontiac Grand Prix, 2003 Pontiac Bonneville, 2003 Chevrolet Monte Carlo, 2003 Chevrolet Impala, and 2003 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.
An overcharging condition may set this DTC. See appropriate GENERATORS & REGULATORS article in ELECTRICAL. Thoroughly inspect any circuitry that is suspected of causing an intermittent complaint. See INTERMITTENT CONDITIONS under SELF-DIAGNOSTIC SYSTEM.