Diagnostic Aids

WARNING: This page is about a different car, the 2006 GMC Yukon XL, 2006 Chevrolet Suburban, and 2006 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

When the vehicle is at ambient temperature the IAT sensor and the ECT sensor temperatures should be relatively close to each other. Refer to Temperature vs Resistance .
If a short to a separate 5-volt source occurs this DTC may set.
If an intermittent condition is suspected, refer to Testing for Intermittent Conditions and Poor Connections .