Skoda Praktik exhaust treatment malfunction

Hey, I drive a similar Skoda Praktik but I'm not sure about the year. I had a similar issue with the check engine light, rough running, and a strong exhaust smell, which turned out to be a faulty oxygen sensor. Have you checked the exhaust pipe for visible damage?

Thanks for the quick reply. When you say oxygen sensor, are you referring to the lambda sensor? I'm not very technical, but I read that a defective lambda sensor can cause an exhaust leak and trigger the check engine light. Did you notice any other symptoms, and did you measure the exhaust pipe?

Yes, lambda sensor, sorry! And I did not inspect the exhaust pipe too closely. Because of the exhaust leak and the NOx sensors involved, I would definitely recommend having a professional check it out. They can properly diagnose the issue and replace any faulty components. It could be a crack in the exhaust pipe itself.

Thank you for confirming the issue. I followed your advice and went to a trusted workshop. As suspected, it was indeed the lambda sensor that was defective, causing an exhaust leak. The repair cost came to 375€. Everything is now running smoothly.