U2104 Engine control module (ECM)/transmission control module (TCM)/fuel injector control module (FICM), CAN data bus communication malfunction

Engine control module (ECM)/transmission control module (TCM)/fuel injector control module (FICM), CAN data bus communication malfunction. The control module detected a communication fault involving Engine control module (ECM)/transmission control module (TCM)/fuel injector control module (FICM), CAN data bus on the vehicle network. This is the manufacturer-specific definition used by Chevrolet.

U2104 is a manufacturer-specific code. In this database it is documented for: Chevrolet. The same number can mean something different on other brands.

Not guaranteed. Powertrain (P) codes can be reliably disabled in the ECU calibration, but body, chassis and network codes depend on the specific control unit and how the fault is implemented - some can be handled, some cannot. Ask for a quote and our engineers will check your file and tell you, free of charge, whether U2104 is removable in your case.