Diagnostic Aids

WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

An overheating condition may cause this DTC to set.
After starting the engine, the ECT should rise steadily to about 90° C (194° F) then stabilize when the thermostat opens.
A skewed sensor could result in poor driveability concerns. Refer to Temperature vs Resistance .
If the condition is suspected of being an intermittent, refer to Intermittent Conditions .