Yaris Passenger Seat Error

Had a similar problem with my old Renault Megane, driver's seat though. Check the fuse box, might be a blown fuse for the power seats. Also, wiggle the connector under the seat. Sometimes they get loose or corroded. Did you check those?

Fuses are good. Can you elaborate on the connector issue? Any signs of corrosion or damage? What cleaning methods did you use?

Didn't see anything obvious, just gave the connector a good wiggle and it started working again. Probably just a loose connection. You've checked the fuses and harness, and you're still getting an error code, might be time for a workshop. Could be something more serious.

Took it to a workshop. Faulty seat internal motor, needed replacement. Repair was 290€ including parts and labor.