johannes_blitz9
Skoda Roomster NOx Sensor Issue
Summary of the thread
A Skoda Roomster owner experienced a check engine light issue related to the NOx sensor, accompanied by an unusual exhaust fume smell. The problem was suspected to be a defective cable or plug connection to the sensor. After consulting with others and visiting a mechanic, it was confirmed that the issue was indeed a faulty connection, which was repaired at a relatively low cost, resolving the problem.
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4 comment(s)
johannes_blitz9 (community.author)
Interesting! When you say 'emission sensor', was it also the nitrogen oxide sensor, or something different? And how did you figure out it was the connection specifically?
ChrisWag
Ah, I see! No, it wasn't specifically the nitrogen oxide sensor, but something related to the emission control system. I didn't figure out the connection myself; I took it to a workshop. They said the error was related to loose contact. Given your exhaust leak smell, it's probably best to get it checked professionally, in my humble opinion.
johannes_blitz9 (community.author)
Big thanks for the advice! Turns out you were spot on about the connection. Took it to a mechanic, and the error was indeed a defective cable/plug connection to the NOx sensor. They sorted it out, and the total cost was only 95€ – way better than a whole new sensor! I'm seriously relieved.
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SKODA
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ROOMSTER
ChrisWag
Sounds frustrating! I had a similar issue with my old Renault Megane, though that was a diesel engine. The check engine light kept popping on, and it turned out to be something with an emission sensor too. Did you check the sensor's connection? Maybe it's just loose or corroded?