U0628

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

1. Check continuity of refrigerant pressure sensor B
2. Inspect connectors and contacts for corrosion or damage
3. Check the functionality of the refrigerant pressure sensor B
4. Check the power supply and ground of the sensor
5. If necessary, replace refrigerant pressure sensor B

Related codes

Error U0628 by Vehicle Brand