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  1. P0300 Misfire Before Gladiator had 400 Miles on it. Back to the dealership for the 3rd time.

    I'll take a gander once they finish replacing all the plugs and get it back to me...

  2. P0300 Misfire Before Gladiator had 400 Miles on it. Back to the dealership for the 3rd time.

    I'm at the dealership for the third time in a week and they told me all my firmware is up to date. I'm new to the forums so I'm not up on all the acronyms. What is MDH?

  3. P0300 Misfire Before Gladiator had 400 Miles on it. Back to the dealership for the 3rd time.

    Add me to the list. 781 miles on my 2021 when I got a flashing CEL when my engine started sputtering on my first trip away from home. "Thankfully" I was ~20 miles from a dealership in Sioux City, IA. I put thankfully in quotes because they said it was from an apparently damaged plug in #2...




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