[bjc1973]

got a engine symbol with half shaded yellow come up on the dash today.fault on the I drive said engine fault.full engine power not available drive moderately have problem checked at bmw.after switching engine off then switching back on after a few mins there was nothing there and car drives as normal.
I do have a dtuk tuning box fitted and only running at 10% would this be the problem along with being a really hot day.cheers for any advice