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.

DTCs P0112, P0113, P0182, P0183, P0500, or P1683 are not set.
The engine must be turned OFF for 10 hours or longer.
The start-up Intake Air Temperature (IAT) is more than 59°F (15°C).
The fuel temperature and the Engine Coolant Temperature (ECT) must be within 18°F (10°C) of each other at start-up.