Coolant Temperature Sensor/Switch (For Computer): Testing and Inspection

(_P0116_)
The scan tool indicates Diagnostic Trouble Code (DTC) P0116: A range/performance problem in the Engine Coolant Temperature (ECT) Sensor circuit.

NOTE:
- If DTC P0117 and/or P0118 are stored at the same time as DTC P0116, troubleshoot those DTCs first, then troubleshoot DTC P0116.

Possible Cause
- ECT sensor deterioration
- Malfunction in the cooling system
- Air cleaner (ACL) element damaged or dirty





(_P0117_)
The scan tool indicates Diagnostic Trouble Code (DTC) PO117: A low voltage (high temperature) problem in the Engine Coolant Temperature (ECT) sensor circuit.




(_P0118_)
The scan tool indicates Diagnostic Trouble Code (DTC) PO118: A high voltage (low temperature) problem in the Engine Coolant Temperature (ECT) sensor circuit.