DTC C123B Chevrolet
Engine Coolant Temperature Sensor Circuit High Input
Engine Coolant Temperature Sensor Circuit High Input
Description
Engine started, engine runtime over 60 seconds, and the PCM detected the ECT sensor signal was too low during the test period.
Cause and Solution
ECT sensor signal circuit is shorted to VREFECT sensor signal circuit is shorted to system power (B+)ECT sensor signal circuit is openECT sensor is damaged or has failedPCM has failed
Video Guide
Diagnostic Info
- DTC Code: C123B
- Brand: Chevrolet