Code U0224 indicates that the vehicle's network has lost communication with the door window motor C module. This module controls the operation of a specific window (typically rear or passenger side) and the code sets when the expected data messages are not received over the CAN bus.
The module itself has failed internally due to water intrusion, corrosion, or electrical damage, preventing it from communicating on the network.
The CAN bus wires to the door window motor C module are damaged, broken, or shorted to power/ground, disrupting data transmission.
Loose, corroded, or backed-out terminals in the module connector cause intermittent or complete loss of communication.
A blown fuse, broken wire, or corroded ground point prevents the module from powering up and communicating.
The BCM or another module that routes messages on the bus may have an internal fault, though this is less common than a problem at the door module itself.
Extremely rare; the PCM is not directly involved in door window motor communication and is almost never the cause of this code.
Typically no. U-codes for lost communication often do not illuminate the MIL on their own, but they may be stored and can trigger other warning lights depending on the vehicle.
Yes, the vehicle remains drivable. The only noticeable issue will be the inoperative window, which is a convenience and safety concern but not a mechanical failure.
Almost certainly not. The PCM is rarely the cause of a U0224 code. The problem is almost always in the door window motor module, its wiring, or power supply. Replacing the PCM would be an expensive misdiagnosis.
Not exactly. The code indicates a communication loss, not a mechanical motor failure. However, the module is often integrated with the motor assembly, so the entire unit may need replacement if the module is faulty.