Conditions For Running DTC

WARNING: This page is about a different car, the 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, and 2003 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 140°F (60°C).