'Trans Failsafe Prog' error

[ralphy4321]

I received this error code the other day, took it to dealer they claimed it was my crank case vent hose that needed to be replaced, i knew about this hose for over 6 months but it never gave me an error code or problem, I paid $1703.00 to get it fixed, 2 days later my car died out in NJ, before it died I got the same error message, turns out is my alternator now, the Dealer is saying this same error code had nothing to do with the previous error code. This is hard to believe, and now they want me to pay for again. What can I do or any suggestions. Thanks