U0509Invalid Data Received From Seat Control Module A
- Generic OBD-II code · Network
- How the car detects it
- Seat control module A is usually the electronics of the first powered seat, often the driver's memory seat. The Saab 9-5 code list published by GM spells this out: there, the lost-communication partner U0208 is the memory seat control module. Its frames carry seat positions for memory recall, heating or ventilation states and switch inputs; when another controller receives them but finds them corrupted or implausible, U0509 is the result. Ford names its driver seat electronics DSM rather than by letter, so the A slot is not universal. No public bulletin covers U0509 itself. If the data is bad, memory positions may not recall, easy-entry movement may stop and climate seat functions may be shut off; driving is unaffected.
- What you may notice
- Seat memory positions not recalled
- Seat heating or ventilation unavailable
- Likely causes
- PossibleSeat module configuration or software not matching the vehicle
- PossibleUnder-seat harness or connector damaged by seat travel or objects
- RareSeat control module A internally faulty
- Repair
- Medium · Usually a job for a workshop.Typical cost: €0 – €500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.