Two problems related to check engine light on have been reported for the 2018 Jeep Renegade. The most recently reported issues are listed below.
I purchased a 2018 Jeep Renegade at the end of July 2018, it had worked well until the end of June 2019. I was on a road trip from south carolina to colorado and I was on the road for a week with no issues, but on June 28th as I was driving on I-70 through kansas at about 80 mph when my engine began to stall out. At first it was dropping about 10 - 15 mph, but then it was quickly dropping 30 - 40 mph. I was able to make it into the right most lane, but a check engine light and service transmission light appeared on my dashboard while my engine stalled out completely. I had to restart my car a few times, but after a few restarts the notifications disappeared. Every time the engine stalled out, I would lose the use of my gas and brake pedals. The electronics were still working, but driving was non-responsive. I was able to safely nurse my car into the nearest city and eventually get towed to the nearest Jeep dealership. The dealership was able to look at the Jeep the next day (June 29th) and did some computer diagnostics and told me that the Jeep was good to go. I made it about 180 miles and had just gotten back onto I-70 in colorado when the issue returned. Engine stalled out, dropped speed to zero mph and pedals became unresponsive. I had to wait several hours to be towed to aurora, CO to a Jeep dealership (larry h miller Jeep). My Jeep was with larry h miller from June 29th to July 3rd. They told me that they drove it several hundred miles, despite my odometer not matching their information, and told me that there was no issue with my Jeep. I made it 10 miles from the dealer before the stalling issue returned. This almost caused a crash on a congested narrow highway in denver, CO. When I called the dealer, they told me they couldn't help and to see another dealer. I was towed to a third dealer, who was also not able to find any issue.
My 2018 Jeep Renegade engine dies spontaneously. Check engine light does not come on. It starts back up right away but when placed in gear it dies. The dealership will look at it for a 4th time tomorrow morning 08/14/2019 at 9am. So far the problem has not been resolved. There is a recall list for certain VIN number Jeep Renegade models but my VIN isn't on the list. Engine shouldn't die or stall on a brand new vehicle with less than 20,000 miles. First time it dies was 5,031 miles, then 13,541 miles, then 19063 miles.