U1020
Invalid Or Missing Data For Air Conditioning Clutch Control
Severity
⚠️ MediumCan you drive?
Yes, but get it checked soon
Approx. repair cost
$17–89 (est.)
Symptoms
- Air conditioner doesn't work
- Air conditioning compressor does not turn on
- Hot air from ventilation regardless of settings
- The air conditioner indicator is flashing
- Error message on the climate control display
Causes
- HVAC module malfunction
- Open or short circuit in the communication circuit
- Problems with the engine control unit
- Corrosion of connectors in the air conditioning system
- Software failure in the data exchange system
How to Fix
- Check error codes in HVAC module
- Inspect the connectors and wiring of the air conditioning system
- Check power and ground on HVAC module
- Test the operation of the compressor clutch
- Update module software if necessary