DTC codes / U02xx · Lost communication with a control module / U0232
U0232 means the vehicle's main communication network has lost contact with the left side obstacle detection control module, which is the computer that watches the driver's side blind spot. The module that monitors the network, often the body control module, has stopped receiving the periodic status messages it expects from that left-side sensor 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.
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