alina_tiger8

Seat Alhambra NOx Storage Catalyst Aging Issue

My 2022 Seat Alhambra with a gasoline engine has developed a rather unpleasant habit of illuminating the check engine light. Diagnostics reveals an error related to the NOx storage catalyst aging. I suspect there's an exhaust leak somewhere, because I can hear something that sounds like exhaust leaking. Could a leak cause this kind of problem with the emissions system?

4 comment(s)

That sounds familiar. I had a similar issue with my Opel Insignia, though it was a diesel. Check engine light, error codes related to emissions, the whole shebang. Did you notice any change in fuel efficiency or a strange smell?

Fuel efficiency is difficult to say, as I am not monitoring that regularly. I did notice a strange smell, yes. So, the exhaust leak was also near the catalytic converter? Any advice on how to spot the leak myself before I take it in?

Yes, the leak was also near the catalytic converter on mine. Honestly, unless you have the right tools and know-how, it's tough to pinpoint the exact location. I'd recommend taking it to a reputable shop for proper diagnostics. They can do a smoke test to find even small leaks. It will be worth the cost, trust me.

Closing the loop, I took it to a certified shop as suggested. You were right, exhaust leak near the NOx storage catalyst. Repair including parts and labor for the emissions system was 265€. Ouch, but at least the check engine light is off and hopefully my fuel efficiency will improve. Thanks for the input!

Join the discussion now: