Trans failsafe is "Limp" mode, it means a sensor has triggered due to a fault in OBC. You need to bring it to BMW or a competent shop to have a fault scan done to identify the actual cause. Limp mode allows you to drive short distance (so you're not stranded roadside)
Before going to Bmw... get your battery and alternator checked... a low voltage from either of these can cause the comp to miss read sensors. After spending alot of money on my 1997 Bmw 535i for it to have a second had gearbox fitted... the fail safe was still coming up... Them my alarm kept going off... i had a car before where the alarm kept going off and was told to replace batt which solved it. So i replaced batt on my Bmw to solve alarm issue and it solved my fail safe issue to. I later had my old bmw batt tested for free by a friend and it is ment to be able to with stand a 200amp load for 15mins.... mine only lasted 30 secs.... Altough it turned the starter just fine... Craig
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