One problem related to check engine light on has been reported for the 2012 Buick Regal. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2012 Buick Regal based on all problems reported for the 2012 Regal.
I have had problems with the stabilitrak - check engine light / multifunction indicator light coming on at random times (the on star diagnostic report doesn't give any indication of whats going on with the car so that regular people can understand before going in talking to a dealer about the issue) - powertrain issues I have had to replace my battery when I bought the car I was told it was newer and shouldn't have issues. My driver side headlight is full of water. There have been so many issues with this car yet no recalls have been found on my particular car. I read reviews from others and the 2012 Buick Regal just seems to have a lot of problems consumers such as myself should be entitled to a huge portion of cash paid for the defective vehicle. I thought it would be a safe family car but it just didn't turn out that way. I was afraid to take my family in my car for 6 months because I didn't know if I would we would be stranded. When I took my car to a certified dealer to get it repaired it was worse my car shook while I drove. Buick just isn't the car for me or anyone until they are able to create a safe car. Aesthetically newer model Buicks are nice but mechanically they are a bust.