Conditions for Running the DTC

WARNING: This page is about a different car, the 2004 GMC Envoy XUV, 2004 GMC Envoy XL, 2004 Chevrolet TrailBlazer, and 2004 Buick Rainier. 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 1 signal is more than 8 volts.
The MAF sensor frequency is stable for more than 1 second.