Help! I’ve been trawling through old and new threads and don’t seem to be getting anywhere with the P1109 on my Cooper R50 Automatic.

I can avoid it by just not taking my foot off the accelerator too quickly but the fact that if I do around 3k revs I get a P1109 fault code.

full service done, throttle body cleaned, MAP sensor changed out - any ideas?

I’ve checked online also and can’t seem to find out if the R50 Cooper had a MAP and a MAF? Some places online say they are the same thing on an R50, any ideas on this?