Code Definition

U1283 — Lost Communication With Passenger MICU

System: Network Communication  |  Type: Manufacturer-Specific  |  Make: Honda

About U1283

U1283 is a manufacturer-specific network communication diagnostic trouble code recorded for Honda vehicles. It belongs to the U-prefix family of codes, which covers inter-module network communication (CAN, LIN, FlexRay, or similar) faults.

Scanning & clearing: Network (U) codes report communication faults between modules. When diagnosing U-codes, checking the vehicle's CAN bus integrity, supply/ground at each module, and reading all modules for related faults is usually the first step.

U1283 is a manufacturer-specific code. The same code string on a different make may have a different meaning. Always confirm the code's definition against the vehicle's service information for the specific make and model under test.

Code Information

The Body Control Module communicates with the Passenger Multiplex Integrated Control Unit (Passenger MICU) over the body multiplex network to coordinate passenger side body electrical functions such as lighting, power accessories, and switch inputs on that side of the vehicle. DTC U1283 is set when the BCM or network master receives no valid messages from the Passenger MICU for a calibrated period, indicating the Passenger MICU is offline or its section of the body network has been interrupted. The Passenger MICU relays and controls passenger side loads and reports switch states back to the ma...

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