DTC codes / U02xx · Lost communication with a control module / U0236
U0236 means the vehicle's main communication network has lost contact with the steering angle sensor module, which is the component that reports the steering wheel's position and turning rate to the stability control system. The computer sets this code when it expects regular messages from that module over the controller area network (CAN) bus but receives none within a set time window.
Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.
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