Good day,
hoping someone can help us out with a situation we are having mind aches over. My son performed an M54B25 auto swap to M52B28 & ZF5 manual trans, had a guy perform ews delete & reprogram. everything paired up nice, car cranks on 1st turn, idles perfect, but appears to be in failsafe mode will not rev over 4k rpms nor go over 55mph. after hooking up code reader BM700 only code that displays is P0601. The new/used swap came out of a 2000 528i bmw. My sonns car is originally a 2001 525i BMW, any possible ideas or point me in the right direction will tremendously be appreciated.
Thank you
