P0668 Chevrolet DME Internal Fault Interior Temperature Sensor Signal
Possible causes
– Open or shorted interior temperature sensor circuit condition
– Poor interior temperature sensor electrical connection
– Faulty ECM /TCM
– Poor interior temperature sensor electrical connection
– Faulty ECM /TCM
Tech description
Replace DME as sensor is internal component
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
P0668 Chevrolet Description
PCM/ECM/TCM internal temperature sensor circuit low