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lukassmith3

Skoda Praktik NOx Storage Catalyst Aging

I have a 2010 Skoda Praktik with a gasoline engine and close to 240000 km. The check engine light illuminated, and the error memory points to the NOx storage catalyst aging. I've also noticed a distinct exhaust leak. Could this leak be the primary reason for the nitrogen oxides issue? Estimated automotive repair cost is around 265€.

Summary of the thread

A 2010 Skoda Praktik owner experienced a check engine light, with diagnostics indicating NOx storage catalyst aging and a noticeable exhaust leak. The exhaust leak was identified as a likely cause of the NOx issue, as it can disrupt sensor readings and combustion efficiency. Repairing the exhaust leak was recommended as the first step, which was subsequently done, leading to improved fuel efficiency and resolution of the check engine light.

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4 comment(s)

peterkoehler98

The check engine light and error code, along with the exhaust leak, strongly suggest an issue with your NOx storage catalyst. I had a similar problem with my previous Opel Astra; NOx emissions were high, and the engine light was constantly on. Addressing the leak is paramount; a faulty exhaust system throws off the sensor readings, impacting NOx emissions and fuel efficiency.

lukassmith3 (community.author)

So, you think the leak is definitely the primary suspect here? I was worried it might be the NOx storage catalyst itself failing, given the mileage. Any specific areas of the exhaust system I should be inspecting closely before taking it to a shop?

peterkoehler98

Focus on the exhaust system first. The leak allows unmetered air into the system, disrupting the combustion process and skewing sensor data, leading to the NOx emissions problem. While the catalyst itself might be aging, sealing the exhaust leak should be the initial step. If the issue persists after the leak is addressed, further diagnostics regarding the catalyst's efficiency will be needed. I would recommend a workshop assess the exhaust system.

lukassmith3 (community.author)

Took the Praktik to a local shop as advised. They confirmed the exhaust leak and, after welding, reset the engine light. Total cost was 265€. Fuel efficiency already seems to be improving. Thanks for the heads-up!

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SKODA

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PRAKTIK