So I live in sicily and my mini just started throwing O2 codes, first p0130 i quickly replaced the o2 and i went away for about a week, now it is throwing p0130 & p0138 and my fuel eco has dropped from 33 down to 26 and i have lost alot of power and some times it feels like the car is going to stall out when i take off from a stop.

At one time i was running an after market megan header but had to go back to stock when the flex joint got a big leak, and thats when i problems started.