Conditions for Running the DTC

WARNING: This page is about a different car, the 2002 Pontiac Grand Prix. However, it is still accessible from the selected car via links, so may be relevant.

The DTC can set anytime the ignition switch is in the ON position.
The DTC can set when the vehicle speed is greater then 6 km/h (4 mph) and the brake pedal is not applied.
The DTC can set when the vehicle speed is greater then 15 km/h (9 mph) and the brake pedal is applied.