Possible Causes
- Intermittent Condition
- ECT Sensor Internal Failure
- ECT Sensor Signal Shorted To Ground
- ECT Sensor Signal Shorted To Sensor Ground Circuit
- ECT Sensor Signal Circuit Shorted To Battery Voltage
- ECT Sensor Voltage Below 1.0 Volt
- ECT Sensor Signal Circuit Open
- Sensor Ground Circuit Open
- PCM