One problem related to crankcase (pcv) has been reported for the 2012 Hyundai Sonata. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2012 Hyundai Sonata based on all problems reported for the 2012 Sonata.
My car stalls all of the sudden out the blue during driving sometimes it kills causing me to almost get hit a couple times because it just goes out during driving. It has a misfire and a strong scent of exhaust coming from the car. I have take it to mike morgan hyuandi in louisiana where the mechanic clearly tells me they feel the misfire and smell the exhaust but no engine lights are on so no codes can be read and they cant do anything. He even told me if I'm driving and the car stalls try to get a video of the rpms of what the car is doing and reading during that time so he can have something to go off of, boy how unsafe was that advice. I have taken this car to gateway as well as a local mechanic all who has put it on the diagnostic machine yet still noone can find the issue because again it has no check engine lights on so what do I do. I dont have money to just buy parts and hope that fixes it. The car drinks oil but there is no visible oil leaks. No droppings in my drive way. Some one told me the pcv valve may needs to be changed but again I dont have money to keep changing out parts hoping thats it. This is a known issue with these cars and I feel hyuandi needs to do something because it's nothing that all consumers are doing wrong the motors are just no good.