Engine Error
P0118
Engine Coolant Temperature Sensor 1 Circuit High
Severity
Medium
Symptoms
Cooling fans running always, hard start when cold, rich air-fuel mixture
Common Causes
- Bad ECT sensor
- Corroded connector
- Low engine coolant
- Short in wiring
How to Fix
- 1 Replace ECT sensor
- 2 Repair sensor connector
- 3 Check coolant level
- 4 Verify wiring continuity
Estimated Repair Cost
USD
$100
–
$250
ECT sensor: $40 - $100; Labor: $100