U0629
Lost Communication With A/C Refrigerant Temperature Sensor B
U0629 is an OBD-II diagnostic trouble code meaning: Lost Communication With A/C Refrigerant Temperature Sensor B. Common causes: open or short circuit in the sensor circuit, oxidized or damaged connector pins. Estimated repair cost: $17–56.
Symptoms
- Air conditioning system not working
- Increased temperature in the cabin
- Error indication on the instrument panel
- Unstable climate control operation
Causes
- Open or short circuit in the sensor circuit
- Oxidized or damaged connector pins
- Faulty refrigerant temperature sensor B
- Wiring Harness Problems
- Malfunction of the climate control control unit
How to Fix
- Diagnose the electrical circuit of the sensor
- Check the condition of connectors and contacts
- Test coolant temperature sensor B
- Replace sensor if necessary
- Check the operation of the air conditioning system after repair
Related codes
Error U0629 by Vehicle Brand
FAQ
What does the U0629 code mean?
U0629 is an OBD-II diagnostic trouble code that indicates: Lost Communication With A/C Refrigerant Temperature Sensor B
What causes a U0629 error code?
The most common causes of U0629 include: Open or short circuit in the sensor circuit; Oxidized or damaged connector pins; Faulty refrigerant temperature sensor B; Wiring Harness Problems.
How do I fix a U0629 diagnostic trouble code?
To fix U0629: Diagnose the electrical circuit of the sensor. Check the condition of connectors and contacts. Test coolant temperature sensor B. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U0629?
Yes, but get it checked soon
How much does it cost to fix U0629?
The estimated repair cost for U0629 is $17–56. Actual cost depends on your vehicle, location, and labor rates.
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