Hi JTLaw & everyone!
I'm just wondering if you ever got this fault / problem fixed?
My friend has a late 2004 facelift model MCS with JCW 210bhp upgrade... And has been experiencing similar problem for over 2 years!
He has spend hundreds, maybe thousands! of pounds trying to get it fixed, at both MINI dealers and independent garages..
Symptoms are as described above.. with common reoccurring Fault code P2138 (and also P1237)
My friend has also had his Pedal, Throttle Body and MAP sensor replaced, but to no avail... sometimes the fault will mysteriously seem to disappear for a couple of weeks after it's been to the garage, but then it returns :-/
ANY ideas / suggestions much appreciated :-)
Thanking you in anticipation.