[amidgeha]

Engine Coolant Temperature/Fuel Temperature Correlation

The Powertrain Control Module (PCM) monitors the Engine Coolant Temperature sensor and Fuel Temperature sensor signal. The PCM sets the OBDII code when the Engine Coolant Temperature sensor and Fuel Temperature sensor signal are out of factory specifications.

Cause:
Faulty Engine Coolant Temperature
Engine Coolant Temperature harness is open or shorted
Engine Coolant Temperature circuit poor electrical connection
Faulty Fuel Temperature sensor
Fuel Temperature sensor harness is open or shorted
Fuel Temperature sensor circuit poor electrical connection

Symptoms:
Check engine light