U0164
Lost Communication With HVAC Control Module
Severity: MEDIUM
Symptoms
- The air conditioning system does not work
- No indication on HVAC display
- The fan does not turn on
- Climate control buttons do not respond
- Check Engine light comes on
Causes
- Broken or damaged wires
- HVAC module fuse blown
- Climate control module malfunction
- Problems with the CAN bus
- Poor contact in connectors
How to Fix
- Check HVAC module fuses
- Inspect the wiring harness for damage
- Check the module supply voltage
- Scan the CAN bus for errors
- Replace HVAC module if necessary