Conditions For Running DTC

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2003 GMC Sonoma, 2003 GMC Jimmy, 2003 Chevrolet S10 Pickup, 2003 Chevrolet Blazer, and 2002 GMC Sonoma. However, it is still accessible from the selected car via links, so may be relevant.

Key ON Test

No generator, CKP sensors, or CMP sensor DTC's are set.
The key is in the RUN position.
The engine is not running.

Run Test

No generator, CKP sensors, or CMP sensor DTC's are set.
The engine is less than 3000 RPM.