I am getting a TCM fault and it turned out the battery is low. How can I determine that to alternator is not going bad
What is your question?
Car will not drive forward, only backward. Scanned and got a TCM fault. Trickle charged the battery and it was fine for a day of driving. I am thinking about getting a new battery but if the alternator is bad then there is now point.
RepairPal Certified shops can diagnose and repair your 2014 BMW 640i. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.
Once you get the car running check for voltage at the battery. Should show upper 13s. A more complete diagnosis would be getting it on a load tester so Use this link to find a good shop near you.
https://repairpal.com/repair-shops
Alex
