Focus Oxygen Sensor Issue

I had a similar issue with my Focus. Error memory said problems with the air-fuel ratio. Have you checked the cable and plug connections to the oxygen sensor? That can often be the culprit.

Thanks! I visually inspected the cable and plug, but didn't see anything obvious. Were your symptoms similar, especially the increased fuel consumption?

Yes, the symptoms were identical, including the elevated fuel consumption. I think you should visit a workshop to get the wiring and the sensor checked with professional tools. It's the most efficient way.

Thanks again! The workshop confirmed a defective plug connection. Repair cost 95€, and the issue is resolved. I appreciate the help!