DTC P0118: Engine Coolant Temperature (ECT) Sensor Circuit, High Input: Condition
DTC is set if input voltage from ECT sensor is more than 4.9 volts. This is a continuous monitor. MIL is illuminated when Powertrain Control Module (PCM) detects malfunction during first drive cycle. Possible causes are:
- ECT sensor malfunction.
- Open or short circuit between ECT sensor and PCM.
- PCM malfunction.