F25 2011 Engine Light On

[ali.golfam@gmai]

Hi All


A few months ago I got an engine light on and scanned anf got the following errors:


- 118602 Oxygen sensor before catalytic converter,system checksignal fixed at rich
- 128301 Oxygen sensor before catalytic converter,fine mixture controlexhaust gas after catalytic converter too lean


So far I have changed my MAF Sensor, Engine Air Filter Na both upstream Oxygen Sensors and still get the same error everytime temperature goes above ~+2°C.


I have not noticed an increase in fuel consumption however I do smell fuel from my exhaust. Anybody has any idea what could be the issue?

[Subydayo]

I commented the same on Bimmerpost:

This post might be of some interest to you: https://f30.bimmerpost.com/forums/sh....php?t=1847944


I would definitely start by measuring the fuel trims.


Also which F25 do you have? 28i? 35i? It would also be good to include mileage, and as much info as possible really.