What does code U0662 mean?

Q: What does code U0662 mean?

Lost Communication With Right Rear Temperature Actuator B. U0662 is a generic network communication code indicating that a control module on the vehicle's data bus has lost contact with the right rear temperature actuator, which is the small motor that moves a blend door to set rear cabin temperature. The module that monitors this actuator, typically the rear HVAC control module or body control module, has stopped receiving expected messages or feedback from the actuator circuit, so it sets this code and may default the rear temperature to a fixed setting.

DTC codes / U06xx · Network communication / U0662

U0662Lost Communication With Right Rear Temperature Actuator B

U0662 is a generic network communication code indicating that a control module on the vehicle's data bus has lost contact with the right rear temperature actuator, which is the small motor that moves a blend door to set rear cabin temperature. The module that monitors this actuator, typically the rear HVAC control module or body control module, has stopped receiving expected messages or feedback from the actuator circuit, so it sets this code and may default the rear temperature to a fixed setting.

SystemNetwork

Code typeGeneric (all makes)

SeverityLow

Fix difficultyIntermediate

AreaNetwork communication

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.