P0118
Engine Coolant Temperature Circuit High Input
Generic code
Fuel and Air Metering
High severity
Moderate repair
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What P0118 means
- The fault code P0118 indicates that there is a high input in the engine coolant temperature (ECT) circuit, indicating that the engine is running hotter than it should be. This may result in a loss of power or acceleration, poor fuel efficiency, or engine damage if not addressed.
Possible symptoms
- Illuminated check engine light
- Engine running hot or overheating
- Decreased fuel efficiency
- Loss of power or acceleration
- Engine damage (if not addressed)
Possible causes
- Faulty engine coolant temperature sensor
- Short or open circuit in the engine coolant temperature sensor wiring
- Corroded or damaged engine coolant temperature sensor connector
- Failed engine control module (ECM)
Related parts
- Engine Coolant Temperature Sensor: The coolant temperature sensor measures the temperature of the engine coolant. Problems lead to engine overheating
Possible solutions
- Replace the engine coolant temperature sensor
- Check and repair any damaged wiring or connections
- Clean or replace the engine coolant temperature sensor connector
- Replace the engine control module (ECM) if necessary
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P0118 on OBD DashX
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