BMW's can be a bear when it comes to scan tools and communication. Especially when it is not the basic OBD II system you are trying to talk to. Most of the under $1,000.00 tools only do the engine ABS and airbags and some live data. When you need to talk to the transmission or one of the other modules they are usually not an option.
In this case you may need to find a dealer to scan it and see what is going on in the transmission. That would give you a start at the problem.
Sunday, April 15th, 2018 AT 7:06 PM