One problem related to check engine light on has been reported for the 2020 Ford F-250. The most recently reported issues are listed below.
Check engine light came on while driving at highway speeds on the freeway. Truck began to sputter slightly when coming to a stop. Vehicle was still drivable and I was able to make it home. Later diagnosis at dealership showed the problem to be a defective spark plug wire. I have since read that this is a common problem with the new 7. 3 gas engine by Ford.
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