故障コード索引 · medium
P0118
ECT Sensor circuit low voltage (high coolant temperature)
ECT Sensor circuit low voltage (high coolant temperature)
Documented for: 2.0L gasoline; 2.5L/3.0L gasoline · System(s): EMS EOBD, EMS OBD II · Factory MIL flag: 2 · Default action: ECM Default: –EOT value substituted (no greater than 95 °C (203 °F) –Closed loop fuel metering inhibited –Adaptive fuel metering inhibited –Catalyst warm-up ignition retard inhibit…
Common causes
- Engine overheat condition ECT Sensor to ECM wiring: short circuit to ground ECT Sensor failure
Quick checks
- Confirm freeze-frame and conditions when the code set
- Inspect connectors, grounds, and harness for the circuit named in the code
- Compare live sensor values vs expected (unplugged/biased sensors are common)