This diagnostic trouble code indicates a communication failure between the vehicle's control network and the rear climate control mode actuator. Consequently, the system cannot adjust the direction of airflow for rear passengers. This issue is typically electrical or related to the actuator module itself.
Wires leading to the rear of the vehicle often suffer from chafing, cuts, or wear over time.
Moisture or vibration can cause poor contact at the actuator module plug.
The internal motor or electronics within the actuator assembly may stop functioning.
A power supply interruption will prevent the module from communicating on the network.
The main climate control head unit may fail to send or receive signals correctly.
Internal network failure within the primary computer is possible but statistically rare.
No, this code relates to the rear climate system, and replacing the engine computer will not resolve it.
Yes, the vehicle is drivable, but rear passenger comfort features will be limited.
The underlying electrical fault or component failure remains unresolved.
Yes, water intrusion into rear connectors or modules can disrupt communication signals.