hermannmaier1

Seat Exeo Diesel Oxygen Sensor Issue

I'm experiencing some issues with my 2009 Seat Exeo diesel. The check engine light keeps coming on, and when I checked the error memory, it points to the oxygen sensor. I've also noticed that my fuel consumption has increased noticeably. Could this be due to an aged oxygen sensor? I read somewhere that a defective cable or plug connection could also be the culprit.

A 2009 Seat Exeo diesel owner experienced a check engine light and increased fuel consumption, with error codes indicating an oxygen sensor issue. Potential causes included an aged sensor or defective cable connections. After consulting a garage, it was confirmed that the problem was due to a defective sensor cable connection. Replacing the sensor resolved the issue, clearing the error memory and potentially normalizing fuel consumption.

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4 comment(s)

I had something similar happen with my Exeo. Check engine light, the whole shebang. Is your fuel consumption really bad? For me, it was the oxygen sensor too, messing with the air-fuel ratio. Have you checked the sensor's connections? Sometimes it's just a loose or corroded plug.

When you say check the connections, is that something I can easily do myself? I'm not really a mechanic, but I'm willing to give it a shot if it's straightforward. Where exactly is the oxygen sensor located? Is it easy to get to?

If you're not super confident with car maintenance, I'd suggest taking it to a garage. They can properly diagnose the exhaust system and confirm if it's the sensor or something else affecting the air-fuel ratio. They'll be able to check the sensor and those automotive sensor connections properly. It's probably worth the money for the peace of mind.

Took the car to a local garage. The oxygen sensor cable connection was defective. They replaced the sensor for 95€, the check engine light is gone, and the error memory is clear. Hopefully, my fuel consumption will return to normal soon.

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SEAT

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EXEO