DTC P0118: Engine Coolant Temperature (ECT) Sensor Circuit, High Input: Condition
WARNING: This page is about a different car, the 2002 Suzuki Vitara. However, it is still accessible from the selected car via links, so may be relevant.
DTC is set when Engine Control Module (ECM) detects Engine Coolant Temperature (ECT) sensor input voltage is less than 0.16 volts for 5 seconds continuously, with engine running. Low engine coolant temperature (high voltage - high resistance). MIL is illuminated when ECM detects malfunction during first drive cycle. Possible causes are:
- ECM malfunction.
- ECT sensor malfunction.
- ECT sensor circuit malfunction.