One problem related to automatic transmission control module has been reported for the 2012 Volkswagen Jetta. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2012 Volkswagen Jetta based on all problems reported for the 2012 Jetta.
Leaving work I had started my car let the car idle down put it in drive and it slammed into gear after taking off the car shifted into 3rd gear and no higher after noticing this I pulled over put the car in park and tried shifting through the gears and it continued to slam into drive and reverse so I turned the vehicle off and started it back up at that point the mil was on and the service wrench was light up. Called me dealership they had the car towed to a Volkswagen dealership upon their diagnoses they said it could be a wiring issue possible a transmission control module issue upon further investigation the transmission control module had been warrantied previously (as I am the second owner of the car).