What does code U0286 mean?

Q: What does code U0286 mean?

Lost Communication With Radiator Anti-Tamper Device. U0286 is a generic network communication code indicating that a control module on the vehicle's Controller Area Network (CAN) bus has lost contact with the radiator anti-tamper device, which is a sensor or module that monitors the radiator shutter assembly for tampering or obstruction. The module that sets this code has detected that expected periodic messages from the anti-tamper device have stopped arriving within the required time window, triggering a communication fault rather than a direct sensor failure.

DTC codes / U02xx · Lost communication with a control module / U0286

U0286Lost Communication With Radiator Anti-Tamper Device

U0286 is a generic network communication code indicating that a control module on the vehicle's Controller Area Network (CAN) bus has lost contact with the radiator anti-tamper device, which is a sensor or module that monitors the radiator shutter assembly for tampering or obstruction. The module that sets this code has detected that expected periodic messages from the anti-tamper device have stopped arriving within the required time window, triggering a communication fault rather than a direct sensor failure.

SystemNetwork

Code typeGeneric (all makes)

SeverityLow

Fix difficultyIntermediate

AreaLost communication with a control module

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.