Diagnostic Aids

WARNING: This page is about a different car, the 2007 Hummer H2. 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 Versus 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 .