U0264 is a network communication fault indicating the vehicle's powertrain control module (PCM) has lost contact with the rear camera module on the Controller Area Network (CAN) bus. This is a manufacturer-specific code (some define it as 'Lost Communication With Rear View Camera Module') and does not directly affect emissions, but it disables the backup/rearview camera function.
The camera module itself has internal electrical failure and no longer transmits data on the CAN bus, which is the most common cause of this code.
Wiring between the rear camera and the network harness is damaged, corroded, or connectors are loose or corroded, breaking communication.
A fuse supplying power to the rear camera module has blown due to short circuit, overload, or age.
The ground wire for the camera module is corroded, loose, or damaged, preventing proper electrical function and communication.
Aftermarket stereo, backup camera, or infotainment systems were improperly installed and interfere with OEM network communication.
Extremely rare - the powertrain control module itself has an internal communication failure, and this should be diagnosed only after all other causes are ruled out.
Yes, the vehicle is mechanically safe to drive, but you will not have a functioning backup camera, which reduces visibility when reversing and may violate local regulations if the camera is required for safety.
Almost never. While some may incorrectly recommend PCM replacement, the PCM is rarely the cause of this communication loss. The failed component itself (camera, wiring, connectors, or fuses) is almost always the culprit.
If you have basic mechanical and electrical knowledge, it is possible to replace the camera yourself. However, many rear cameras are integrated into tailgates or bumpers and require specialized knowledge. Ensure you obtain the correct OEM-style replacement for your vehicle.
Aftermarket stereeos and infotainment systems can interfere with the vehicle's CAN bus communication if not properly integrated, or they may have damaged related wiring during installation. A proper installation should retain factory network communication.