Conditions for Running the DTC

WARNING: This page is about a different car, the 2007 Pontiac G5 Pursuit, 2007 Pontiac G5, and 2007 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.

Voltage supplied to the BCM is in the normal operating range, approximately 9-14 volts.
The ignition switch must be in the ACCESSORY or RUN position.
The park lamps must be ON.