U0630
Lost Communication With Engine Coolant Temperature Sensor 4
U0630 is an OBD-II diagnostic trouble code meaning: Lost Communication With Engine Coolant Temperature Sensor 4. Common causes: open or short circuit in the sensor circuit, oxidized or damaged connector pins. Estimated repair cost: $9–39.
Symptoms
- Check Engine Light Is On
- Incorrect temperature readings on the dashboard
- Increased fuel consumption
- Problems with engine warming up
- Reduced engine power
Causes
- Open or short circuit in the sensor circuit
- Oxidized or damaged connector pins
- Malfunction of coolant temperature sensor No. 4
- Wiring Harness Problems
- Engine control unit malfunction
How to Fix
- Check the integrity of the sensor circuit
- Inspect and clean the connector contacts
- Test sensor resistance
- Replace temperature sensor if necessary
- Check connections to the control unit
Related codes
Error U0630 by Vehicle Brand
FAQ
What does the U0630 code mean?
U0630 is an OBD-II diagnostic trouble code that indicates: Lost Communication With Engine Coolant Temperature Sensor 4
What causes a U0630 error code?
The most common causes of U0630 include: Open or short circuit in the sensor circuit; Oxidized or damaged connector pins; Malfunction of coolant temperature sensor No. 4; Wiring Harness Problems.
How do I fix a U0630 diagnostic trouble code?
To fix U0630: Check the integrity of the sensor circuit. Inspect and clean the connector contacts. Test sensor resistance. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U0630?
Yes, but get it checked soon
How much does it cost to fix U0630?
The estimated repair cost for U0630 is $9–39. Actual cost depends on your vehicle, location, and labor rates.
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