Conditions for Running the DTC

WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

DTCs P0237, P2227, P2228, P2229 are not set.
The engine speed is more than 500 RPM.
The total fuel quantity burned is more than 2,000 mm³ .
The engine coolant temperature (ECT) is more than 60° C (140° F).