whats it's mean when a transmission failsafe program from bmw x5 2001" on 2001 BMW X5

whats it's mean when a transmission failsafe program from bmw x5 2001" i use to stop and restarted engine,and now my speed mph not workin, and i can't drop manuel no more,fransmission failsafe program keep blinking

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3 answers
I'm having the same problem with my 2005 bmw x5. I've replaced the alternator and battery and still get that fault. I've hooked up a voltmeter and drove around till the fail safe warning comes in and I've noticed my voltage spikes to 17vdc plus. There may be a problem with the ecu. Might want to check it out.
possible internal trans issue or module problem,seek a free diag at aamco the shop price and diag
When I had this problem, it was because my alternator was faulty.
I replaced the both alternator and the battery and never had that problem again.