Error code
OBD2 U0165
OBD2U0165
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.
What it means
Lost Communication With HVAC Control Module Rear.
Severity
moderateCan continue driving, but comfort features may be compromised.
Summary
U0165 indicates lost communication with the HVAC control module in the rear of the vehicle. This issue affects the data bus connecting to the NC (not clearly specified) control module.
Common Causes
- Faulty or damaged wiring harness between the main and rear HVAC modules
- Malfunctioning rear HVAC control module
Fixes
FAQ
What does U0165 mean?
U0165 means the vehicle's diagnostic system has lost communication with the HVAC control module located in the rear of the car.
How do I fix U0165?
Fixing U0165 typically involves checking and repairing any damaged wiring between the main and rear HVAC modules or replacing a faulty rear HVAC control module.
Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.
More OBD2 codes
- U0100Lost Communication With ECM/PCM A
- U0101Lost Communication with TCM
- U0102Lost Communication with Transfer Case Control Module
- U0103Lost Communication With Gear Shift Module
- U0104Lost Communication With Cruise Control Module
- U0105Lost Communication With Fuel Injector Control Module
- U0106Lost Communication With Glow Plug Control Module
- U0107Lost Communication With Throttle Actuator Control Module
- U0108Lost Communication With Alternative Fuel Control Module
- U0109Lost Communication With Fuel Pump Control Module
- U0110Lost Communication With Drive Motor Control Module
- U0111Lost Communication With Battery Energy Control Module 'A'