Severity: Moderate
Drivable, but it can cause more damage or poor economy. Get it checked within days.
What P0117 means
Coolant temperature sensor signal is too low (the computer sees a very hot engine).
Symptoms
- Cooling fans run constantly
- Hard starting
- Rich running
Common causes
Most likely first
- 1Shorted sensor
- 2Wiring shorted to ground
How we diagnose it
- Compare scan reading to actual temperature
- Unplug sensor and watch the reading change
Every vehicle sets codes under its own conditions. We check the factory diagnostic steps and service bulletins for your VIN, so the repair targets the actual cause.