U0165
UNetworkLost Communication With Rear HVAC Module
What does this code mean?
Severity : LowU0165 reports lost communication with the rear HVAC control module. This module handles heating and air conditioning for the rear seats on vehicles fitted with it. The fault usually does not affect driving, but rear comfort controls may stop working.
Symptoms
- Rear climate controls not working.
- Rear ventilation stuck or absent.
- Message or warning light on the dashboard.
- Other network codes possible.
Possible causes
- Blown fuse for the rear module.
- Corroded or unplugged module connector.
- Open or pinched communication wiring.
- Faulty rear HVAC control module.
- Low battery voltage.
Diagnosis and repair
- Check the fuses for the rear HVAC module.
- Check power and ground at the module with a multimeter.
- Inspect the connector and communication lines.
- Replace or reprogram the module if it does not respond.
- Clear the code and test the rear controls.
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Code
U0165
Category
Network
Prefix
U
Standard
OBD-II / SAE J2012