DTC codes / U05xx · Network communication / U0511
U0511 indicates that a control module on the vehicle's network received invalid or missing data from the seat control module C, which manages powered seat functions on one side of the vehicle. The receiving module detected that the expected data frames were either absent, corrupted, or outside the acceptable range, so it flagged the communication fault and may disable certain seat adjustments or memory features.
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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