DS3 O2 Sensor Issue

I also drive a DS3. I recently had the check engine light and a diagnostic code pointing to the oxygen sensor. After checking, the cable and connector were fine.

If the cable and connector were fine, what was the problem? Did you replace the sensor itself, or was it something else?

I'd recommend getting it checked by a certified technician. My cable and connector looked okay, but I took it to a workshop. Their diagnostics found the real problem.

Took it to the workshop, and it was a faulty O2 sensor. Replaced it for 95€, and the check engine light is gone. Fuel consumption seems normal again. Thanks for the help!