U0076 indicates that the vehicle's control network (CAN Bus D) has lost communication with one of the control modules. The PCM detects that messages from the designated module are not being received.
A poor electrical connection at the module's plug or at the bus termination can interrupt data flow.
Chafed, broken, or exposed wires along the bus can cause intermittent or complete loss of communication.
A blown fuse removes power to the network, resulting in a total loss of messages from the affected module.
The module itself may develop an internal fault that stops it from transmitting or receiving data.
A failure of the PCM's network interface is possible but uncommon; it is typically considered only after wiring and module checks.
No, it most often points to a wiring or connector issue; PCM replacement is rarely required.
The vehicle may still operate, but the affected module could be inoperative; driving is generally safe until repaired.
A visual inspection and basic electrical tests can be completed in 30‑60 minutes; more extensive testing may take longer.
Clearing the code without repairing the underlying fault will cause it to return when the communication loss recurs.