P1118
Engine Coolant Temp Signal Out-Of Range High
P1118 is an OBD-II diagnostic trouble code meaning: Engine Coolant Temp Signal Out-Of Range High. Common causes: coolant temperature sensor malfunction, open or short circuit in the sensor circuit. Estimated repair cost: $6–33.
Symptoms
- Incorrect temperature readings on the dashboard
- Engine overheating
- Increased fuel consumption
- Unstable engine idling
- Difficulty starting the engine
Causes
- Coolant temperature sensor malfunction
- Open or short circuit in the sensor circuit
- Poor contact in sensor connectors
- Problems with the ECU
- Low coolant level
How to Fix
- Check the level and condition of the coolant
- Check the integrity of the sensor wires and connectors
- Test coolant temperature sensor (resistance)
- Replace the coolant temperature sensor if necessary
- Check error codes after repair and make sure they are absent
Related codes
Error P1118 by Vehicle Brand
FAQ
What does the P1118 code mean?
P1118 is an OBD-II diagnostic trouble code that indicates: Engine Coolant Temp Signal Out-Of Range High
What causes a P1118 error code?
The most common causes of P1118 include: Coolant temperature sensor malfunction; Open or short circuit in the sensor circuit; Poor contact in sensor connectors; Problems with the ECU.
How do I fix a P1118 diagnostic trouble code?
To fix P1118: Check the level and condition of the coolant. Check the integrity of the sensor wires and connectors. Test coolant temperature sensor (resistance). For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P1118?
Limited driving only, diagnose soon
How much does it cost to fix P1118?
The estimated repair cost for P1118 is $6–33. Actual cost depends on your vehicle, location, and labor rates.
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