I have a 92 US version e34 525i, my tranny has already been rebuilt because of mechanical failure and had been working properly for the past 6 months. But the Transprogram fault is starting to come back more frequently now. Usually it appears in the morning when I first start it up, then all I have to do is restart the engine, the fault would go away and it will work properly the whole day. My mechanic is trying to zero in on the electricals because he thinks some electrical glitches might be causing the error.
Is the check control module responsible for deciphering these faults? I had an e30 once with a check control module that would tell me somethings wrong but really theres none, I fixed the problem by simply unplugging the module. It ran trouble free until I had to sell it reluctantly. Can I do the same for my 525?