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  1. BlueCoal21

    PCM Error code p1400-00 on a brand new 2020 2500

    Do you have the Service Bulletin number / software update number?
  2. BlueCoal21

    PCM Error code p1400-00 on a brand new 2020 2500

    Any way you can tell me what dealership discovered the problem and the service bulletin ? I’m hoping I can talk to someone over there and maybe get the service bulletin number.
  3. BlueCoal21

    PCM Error code p1400-00 on a brand new 2020 2500

    Did you ever get the issue resolved?? If so, how??
  4. BlueCoal21

    PCM Error code p1400-00 on a brand new 2020 2500

    Well, I purchased a brand new Ram 2500 with a Cummins Motor in it back in September of 2021. It started shifting pretty hard into second gear around 4000 miles. I took it to the dealership where I bought it and got the exact same question you got. Has anyone flashed the PCM? You have a P1400-00...
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