XC70 passenger seat failure

Sounds like a power issue. Have you checked the battery's health? A heavily discharged or defective battery can cause all sorts of weird electrical problems. Power seats need a good, strong current to operate. You might want to get it tested before digging into the seat itself.

Thanks for the quick reply! That's interesting, I hadn't considered the battery. I assumed it was okay since the car starts fine. But, you mentioned 'battery health'. Is that different from just having enough charge to start the engine? How would I test that? I am a total novice when it comes to electrics.

Yes, battery health refers to its ability to deliver consistent power under load, even if it can still start the car. It could be providing enough amps to start but not enough for a power seat. Given that and the error message, it is difficult to know without proper diagnosis, so I would recommend a workshop.

Thanks so much for the advice. I had the battery tested, and you were spot on! It was heavily degraded and needed replacing. After a new battery and diagnostic check at the workshop, the seat now works perfectly! The total cost was 290€, but it fixed the problem. I really appreciate your help!