Diagnostic Aids

WARNING: This page is about a different car, the 2004 Suzuki Swift + and 2004 Chevrolet Aveo. 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 engine coolant temperature should rise steadily, then stabilize after the thermostat opens.
Test the ECT sensor at various temperature levels in order to evaluate the possibility of a skewed sensor. A skewed sensor can result in a driveability condition. Refer to TEMPERATURE VS RESISTANCE .
Check for the proper operation of the engine cooling system.
For an intermittent condition, refer to Symptoms - Engine Cooling .