U0165
Lost Communication With HVAC Control Module - Rear
Severity: MEDIUM
Symptoms
- Rear climate control does not work
- Error messages may appear on the display
- Unable to adjust rear temperature
- Rear climate control fans do not turn on
- The Check Engine light may be on
Causes
- Open or short circuit in wiring harness
- Poor contact in climate control module connectors
- Rear climate control module malfunction
- Fuse or relay problems
- CAN bus fault
How to Fix
- Check fuses associated with the climate control system
- Inspect the wiring harness and connectors for damage.
- Check power and ground on the climate control module
- Scan other modules for communication errors
- If necessary, replace the rear climate control module