U0631
Lost Communication With Engine Coolant Temperature Sensor 5
U0631 is an OBD-II diagnostic trouble code meaning: Lost Communication With Engine Coolant Temperature Sensor 5. Common causes: open or short circuit in the sensor circuit, coolant temperature sensor 5 malfunction. Estimated repair cost: $6–33.
Symptoms
- Check Engine Light Is On
- Increased fuel consumption
- Deterioration of vehicle dynamics
- Engine overheating
- Incorrect temperature readings on the dashboard
Causes
- Open or short circuit in the sensor circuit
- Coolant temperature sensor 5 malfunction
- Poor contact in the sensor connector
- Wiring harness damage
- ECU malfunction
How to Fix
- Check the integrity of the sensor circuit
- Check the resistance of the temperature sensor
- Inspect the sensor connector for oxidation or damage.
- Check wiring harness for damage
- If necessary, replace coolant temperature sensor 5
Related codes
Error U0631 by Vehicle Brand
FAQ
What does the U0631 code mean?
U0631 is an OBD-II diagnostic trouble code that indicates: Lost Communication With Engine Coolant Temperature Sensor 5
What causes a U0631 error code?
The most common causes of U0631 include: Open or short circuit in the sensor circuit; Coolant temperature sensor 5 malfunction; Poor contact in the sensor connector; Wiring harness damage.
How do I fix a U0631 diagnostic trouble code?
To fix U0631: Check the integrity of the sensor circuit. Check the resistance of the temperature sensor. Inspect the sensor connector for oxidation or damage.. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U0631?
Limited driving only, diagnose soon
How much does it cost to fix U0631?
The estimated repair cost for U0631 is $6–33. Actual cost depends on your vehicle, location, and labor rates.
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