U0628
Lost Communication With A/C Refrigerant Pressure Sensor B
U0628 is an OBD-II diagnostic trouble code meaning: Lost Communication With A/C Refrigerant Pressure Sensor B. Common causes: open or short circuit in the sensor circuit, refrigerant pressure sensor b fault. Estimated repair cost: $17–56.
Symptoms
- Air conditioner won't turn on
- Reduced air conditioner efficiency
- Hot air from ducts
- Error indication on the instrument panel
- Increased noise from the air conditioning compressor
Causes
- Open or short circuit in the sensor circuit
- Refrigerant pressure sensor B fault
- Connector problems or contact corrosion
- Air conditioning computer malfunction
- Wiring harness damage
How to Fix
- Check continuity of refrigerant pressure sensor B
- Inspect connectors and contacts for corrosion or damage
- Check the functionality of the refrigerant pressure sensor B
- Check the power supply and ground of the sensor
- If necessary, replace refrigerant pressure sensor B
Related codes
Error U0628 by Vehicle Brand
FAQ
What does the U0628 code mean?
U0628 is an OBD-II diagnostic trouble code that indicates: Lost Communication With A/C Refrigerant Pressure Sensor B
What causes a U0628 error code?
The most common causes of U0628 include: Open or short circuit in the sensor circuit; Refrigerant pressure sensor B fault; Connector problems or contact corrosion; Air conditioning computer malfunction.
How do I fix a U0628 diagnostic trouble code?
To fix U0628: Check continuity of refrigerant pressure sensor B. Inspect connectors and contacts for corrosion or damage. Check the functionality of the refrigerant pressure sensor B. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U0628?
Yes, but get it checked soon
How much does it cost to fix U0628?
The estimated repair cost for U0628 is $17–56. Actual cost depends on your vehicle, location, and labor rates.
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