Seat Altea error codes and potential recoding

Incorrect coding causing that many issues seems a bit odd, doesn't it? Have you recently had any work done on the car's electrical system or had the battery disconnected for an extended period? Did you use the diagnostic scanner yourself, or a workshop?

That's a fair point. No recent electrical work or battery disconnection. I used my own diagnostic scanner, a fairly decent one. What makes you question the coding aspect? Is there something specific about Alteas that makes them less prone to coding errors?

Okay, if you're sure about the scan tool data pointing to coding, it's possible. But honestly, I'd still get a second opinion before committing to recoding. It's not the most common thing, but not unheard of either. Seeing errors in multiple systems makes me lean towards some kind of central issue, maybe corruption. Get a professional diagnostic scan done, then you'll know for sure.

Took the Altea to a workshop specializing in vehicle electronics. My initial assessment regarding the coding was spot on. They recoded the relevant modules, cleared all the error codes, and performed a thorough system check. The malfunction indicator is now off, and the error messages are gone. Total cost came to 360€. Thanks for confirming my suspicions about the coding being the likely culprit.