p0300

  1. Elteejo

    Code P0300 after replacing almost everything

    I need help and some ideas everyone. 2012 JK Unlimited Sahara 138k miles Sorry for the long post but trying to get all the info out at once to be specific. Purchased a JK from a friend about a year ago and have had no issues until recently. About 2 weeks ago, I was driving along fine and...
  2. Jzm7337

    P0300

    Hello, I was driving late one night and my Jeep started driving rough I pulled over and pulled up code p0300. Towed it to my house and replaced the spark plugs. Ohmed out the coil packs and they also seemed fine. Jeep sounded worse after replacing the plugs. Towed it to the dealership that took...