Has anyone had trouble with check engine lights involving the O2 sensor with a DOS CAI and Invidia exhaust?

 

Yeah, but your situation could be unique where is may be something other than a fuel-trim issue.
Scan the ECU for fault codes with a MINI-approved protocol scanner and reply back with the faults.
Because we can't help you diagnosis the issue with known present fault codes.

- Erik

 

Trust me, I'd love to, however I've only had my car 2 days out of the last 3 weeks. It's been at the dealership getting fixed. The amazing thing is, I took it in for a small oil leak with absolutely no check engine lights on. When they told me I could pick it up, at that point the check engine light was on and I refused pickup until they fixed whatever it was that they caused the engine light to come on.