Conditions For Running DTC

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2003 GMC Sonoma, 2003 GMC Safari, 2003 GMC Jimmy, 2003 Chevrolet S10 Pickup, and 2003 Chevrolet Blazer. However, it is still accessible from the selected car via links, so may be relevant.

Engine is running for more than 2 seconds.
Engine speed is more than 400 RPM.
Ignition 1 signal is more than 8 volts.
The MAF sensor frequency is stable for more than.7 second.