U0561Invalid Data Received From Seat Control Switch Module A
- Generic OBD-II code · Network
- How the car detects it
- Modern power seat switches are often small control units of their own: they read the keys and send the result to the seat module over LIN instead of switching motor current directly. A Lear patent describes a seat electronics unit with a LIN driver that acts on commands from such an external switch. Mercedes documents a case for 2026 models: the seat adjustment switch group in the door (front left, SSE-VL) could stay in sleep mode, so the seat no longer moved; unplugging the switch resets it and new switch software prevents a repeat. Lincoln traced missing lumbar settings on the 2022 Aviator partly to the seat switch part level (SSM 51056). U0561 is set when frames from switch module A are implausible; U0260 is the lost-contact code. No bulletin names U0561.
- What you may notice
- Seat cannot be adjusted with the switch
- Seat settings such as lumbar not shown or not selectable on the screen
- Likely causes
- PossibleSeat switch module software fault (e.g. switch stays in sleep mode)
- PossibleSwitch part or software level not matching the seat module
- PossibleLoose or corroded connector at the seat or door switch
- RareSeat control switch module A internally faulty
- Repair
- Easy · Often possible to do yourself.Typical cost: €0 – €400
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.