Three problems related to check engine light on have been reported for the 2012 Nissan Sentra. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2012 Nissan Sentra based on all problems reported for the 2012 Sentra.
Number 3 cylinder low compression with only 83k miles on the vehicle. Rough engine driving and check engine light on. Codes p0300 and p0303 displayed. This kind of engine failure shouldn't happen with such low mileage.
I have owned this car for 2 years. Every year, as it starts to warm up in the spring, the same problem recurs. I have had it to several repair shops, only to be told that it cannot be fixed. As I am driving on the freeway, it will suddenly start to decelerate, and I must pull off the road and let the car sit, turned off, for 20-40 minutes. Last week, the check engine light came on, and when I took it back to the dealer, they want $3000 to fix the car. This has been a problem since the first summer after I bought it.
While driving, a piece fell out of the bottom of the car, after which the engine began to smoke and the car began to lose power. I pulled off the road and turned off the car, at which point the engine became engulfed in flames. The car has had no problems to date, and the check engine light has never come on.