Two problems related to check engine light on have 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.
Midnight, driving back from a friends house. My 16 month old (or rather new) Jetta se 2012, shakes up when I turn on ignition. I give it 2-3 seconds to calm down. It doesn't. Instead, the epc light goes on. Then the check engine light. Hmm. . . Weird. Those wern't on like 2 hours back, or ever infact. Being the Smart techie that I am, I try the highly technical solution to any problem that I don't quite understand - I try to turn it off and on again. The same god awful shaking and stuttering. But no epc light. I think to myself, maybe this is just a transient thing. Try to pull out of the parking space, and there it is . . . The damn epc and check engine light. But my home's only a mile away, maybe things get better on the way there. You know, its a new car (bought 16 months back, brand new, and has ~7600 miles on it). But no, as I try to "drive" the piece of shit, it starts shaking more violently when I get to 25 miles and hour. So, I pull over, and a quick google search tells me to stay below 20 mph and get it to a dealer ASAP. So I get the car towed, and the next day the dealer tells me its a faulty ignition coil that has been replaced and tested and things should just work. But I'm scared to get in that car again. What if this would've happened farther away from my house.
Driving at about 50 mpg, engine control malfunction and engine light both came on at once and vehicle lost power all of the sudden. At this happened on the highway while passing a vehicle it could have ended in an accident.