Two problems related to check engine light on have been reported for the 2021 Jeep Wrangler. The most recently reported issues are listed below.
Vehicle is brand new and the check engine light came on only after 300 miles. Dealer diagosed the problem with O2 sensor failure and valve cover defect. The vehicle ran very rough and felt like it was about to stall. Search on jlwranglerforums shows there are others experiencing similar problems with less than 500 miles on the odometer.
Less than 200 miles on car check engine light starts blinking car also shaking took it to dealer they replaced a spark plug the next day same thing they then replaced all the spark plugs and told me 2021 Wranglers would have a recall on this but I don't notice same problem anywhere.
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