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P0117 Engine Coolant Temperature Sensor Circuit Low
What it means
The coolant temperature sensor signal voltage is too low (reads as extremely hot), often a shorted sensor or wire.
Severity: Moderate
Can I drive it? Drivable with care; check that the engine isn't actually overheating.
Common causes (most likely first)
- Faulty coolant temperature sensor
- Shorted wiring
- Actual overheating
Likely fixes
- Verify real engine temp
- Inspect wiring
- Replace sensor
DIY parts cost
$15–$60
Approximate estimate
Shop repair cost
$100–$250
Approximate estimate, parts + labor
DIY difficulty
Easy
Varies by vehicle
Cost ranges are rough, approximate U.S. estimates and vary widely by vehicle, region, and parts brand. Always confirm the diagnosis before buying parts.
Parts you may need
- Coolant temperature sensorCheck price
- CoolantCheck price
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