One problem related to check engine light on has been reported for the 2016 Ford Mustang. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2016 Ford Mustang based on all problems reported for the 2016 Mustang.
At approximately 61,000 miles, the original engine stopped working. Cylinder #3 gave out. Possibly a lspi condition. The engine was replaced under cpo warranty. My new engine has now given out at 36,000 miles. On the 1st engine, I came from Ford dealer after complaining of check engine lights coming on. Oil was changed, codes cleared. I drove approximately 4 city blocks, accelerated from a stop light, and the engine started blowing white smoke and I pulled it off the road. The engine was determined to have to be fully replaced, at 61,000 miles, a long block, not a short block. On my second engine, which has approximately 35,000 miles on it, I was driving the car and an engine light came on. The car was drivable. After parking it, the next time I started it up it was blowing white smoke again. I diagnoses at the dealer is underway.