Hey there.
Have just started to get into E38 tuning and have a bit of trouble with a customers car.
With the stock calibration on it these arnt a problem and oil life can be set back to 100%.

But once I modify it the service traction control, oil, ABS starts to come up on his dash.
From what iv read its related to being mafless. So I re-enabled the maf just to try it out and that didnt help. Also resetting the oil life to 100% does nothing it stays at 0%.

Will I have to go the custom OS route? Iv already spent quite a bit of time on the dyno with the normal OS so are the calibrations interchangeable between them. (Havnt used the custom OS before and the help instructions dont say anything about it)
Thanks.