Peugeot 1007 Oxygen Sensor Fault

I'm having trouble with my 2008 Peugeot 1007, diesel engine. It's done about 46424 km. The check engine light keeps coming on, and the error memory says something about the oxygen sensor. I've also noticed my fuel consumption seems a bit higher than usual. Anyone else experienced this? I've had a look at the sensor, and the cable and plug connection look a bit suspect. Could be a defective connection, maybe?

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I had a similar issue with my old Opel Corsa. The check engine light was on, and the garage mentioned something about the air-fuel ratio being off. Is that related to the oxygen sensor? I have no idea, to be honest. Could be the O2 sensor is just getting old? How old are they supposed to last anyway?

That's interesting! Yes, the air-fuel ratio is definitely related to the oxygen sensor. It measures the amount of oxygen in the exhaust gases, and that information is used to adjust the fuel injection. Do you remember what fixed the problem on your Corsa? Also, is it easy to tell if it is the oxygen sensor, or is it just a cable issue?

Well, they replaced the exhaust sensor and that fixed it on my Corsa. I guess it was the O2 sensor all along! To be honest, I'm not that technical, and I didn't want to mess with it myself. If the connection looks dodgy, it could be that. But honestly, I'd take it to a workshop. It's probably easier than trying to diagnose it yourself and potentially making it worse!

Thanks for the advice! I took it to my local garage, and you were right – it was the oxygen sensor! They checked the connections, but the sensor itself was just aged. New O2 sensor fitted for 95€, and the check engine light is now off. Fuel efficiency seems to be back to normal too. Appreciate the help!

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