alinatiger6

Skoda Roomster NOx Error and Exhaust Fumes

I have a 2014 Skoda Roomster with a gasoline engine and about 186347 km. The check engine light is on, and the error memory says 'NOx storage catalyst aging'. Also, I smell exhaust fumes more than usual. Could this be an exhaust system leak? I'm trying to avoid huge repair bills.

A 2014 Skoda Roomster owner reported a check engine light with an error indicating 'NOx storage catalyst aging' and an increased smell of exhaust fumes. This issue was suspected to be caused by an exhaust system leak. A suggested solution was to conduct a smoke test to identify any leaks. The problem was confirmed as an exhaust leak, and after repairs, including a new NOx catalyst, the issue was resolved, improving fuel efficiency.

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4 comment(s)

Sounds like a familiar problem! I had a similar issue with my old Renault Megane. Check engine light, error codes... turned out to be a small crack in the exhaust manifold. This can cause air quality problems, mess with the emissions system, and even affect fuel efficiency. Is your exhaust noticeably louder?

Louder exhaust I haven't really noticed, but it could be slowly worsening. Where was the crack on your Renault? Was it easy to spot?

On my Megane, the crack was on the exhaust manifold, near where it connects to the engine block. Not super easy to see without taking some heat shields off. A small leak can trigger NOx catalyst issues and throw those error codes because it messes with the air fuel mixture. The best bet is to take it to a shop and have them do a smoke test on the exhaust system. They can pinpoint any leaks quickly.

Thanks! The shop confirmed an exhaust leak. A new NOx catalyst and exhaust repair cost me 265€, but the light is off, and I expect my fuel efficiency to improve. I appreciate the help.

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SKODA

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ROOMSTER