Conditions For Running DTC

WARNING: This page is about a different car, the 2002 GMC Sierra, 2002 GMC Cab & Chassis Sierra, 2002 Chevrolet Silverado, and 2002 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 500-2700 RPM.
The total fuel quantity burned is more than 2000 mm³ .
The Engine Coolant Temperature (ECT) is more than 158°F (72°C).