mats_becker1
Seat Altea check engine light NOx error
4 comment(s)
mats_becker1 (Author)
Did your issue also trigger a NOx storage catalyst aging error? I'm trying to figure out if I can get away with just patching the exhaust or if the catalyst is genuinely failing because of the leak.
alexanderberger1
Yes, the NOx error was present. The leak was upstream, causing the sensor to read incorrectly, triggering the error. I'd recommend taking it to a workshop and getting the exhaust properly inspected and repaired. They will know if the emissions system requires automotive repair.
mats_becker1 (Author)
The exhaust system leak caused the problem. NOx storage catalyst aging confirmed. Repair cost 265€.
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alexanderberger1
I had a similar issue with my Altea and the check engine light. Exhaust system problems can definitely mess with your emissions system and air quality. Is there any chance you could hear the leak before? How bad is it?