Conditions For Running DTC

WARNING: This page does not describe the selected car, but rather 13 other vehicles, including the 2002 GMC Yukon XL, 2002 GMC Sierra, 2002 GMC Savana Special, 2002 GMC Savana Camper Special, and 2002 GMC Savana. However, it is still accessible from the selected car via links, so may be relevant.

The engine is running for more than 2 seconds.
The engine speed is more than 400 RPM.
The ignition voltage is more than 8 volts.
The MAF sensor frequency is stable for more than 1 second.