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.

DTC P0237 is not set.
The engine speed is between 500-2,700 RPM.
The total fuel quantity burned is more than 2,000 mm³ .
The engine coolant temperature (ECT) is more than 72°C (158°F).