406 Seat Heater Problem

I had a similar issue with my 406. Does the error code point to a specific sensor, or is it a general 'seat heating malfunction' type of code? Knowing that might help narrow down the possibilities.

The error code is pretty generic, just says 'Seat Heating Circuit Malfunction'. Is there a thermal sensor I should be looking for, or is the heating mat the usual suspect?

In my case, the generic code ended up being a defective heating mat within the seat cushion itself. Given the age of the car and the error you're seeing, I'd suggest having a workshop take a look. It's a pain to diagnose properly without the right tools.

Appreciate the insight! Sounds like it's time to bite the bullet and head to a shop. I got a quote for around 390€ for the repair, and it seems like the heating mat is indeed faulty. Thanks again for confirming my suspicions!