On my way to the track, but.....

Hey guys,

FML..I've been waiting for three weeks to get a chance to go to the track finally ready and have a full container of MS109 ready to go and bam! SES light.

Need a bit of help on the code (P2C31 - Bank 1 Oxygen sensor before catalytic, trim control - Exhaust gas after cat conv.), I've searched around and found some old posts on the other forums with no resolution and a recent one e90 where the guy has replaced Pre cat O2 sensors and all injectors but still has the issue. I pm'd the guy to see if he resolved the issue but he won't get back to me.

I first got the code about 300km's ago reset (through CobbAP) and I was fine, but now it comes back right away. I have DISv57 and ran a diagnostic but the code is 'not selectable or deletable' first time I've seen this. It wont let or give me the ability to run a test schedule to dig into the error.

Any thoughts?? I keep the car in good mechanical condition new injectors, coils, plugs approx 1yr ago.

Mods (all done ~1 1/2 yrs ago)

MS catless downpipes
AMS Intercooler
Cobb stg 2+ Agr ST
BMS Dual Cone Intake

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