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Thread: MM3 Error Code 14000

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    Kelvinfreitas's Avatar

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    MM3 Error Code 14000

    I just recently installed my MM3 tuner on my 2018 2500.

    I cannot seem to use my rt tunes as it keeps showing error code 14000.

    I unplugged and replugged everything and still nothing.

    Also the tuner doesn't sense truck is turned on after its been turned off and turned on again.

    I would have to unplug it from the OBD port and replug it to work normally.

    Anyone can help me here?

    First time using this tuner.


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    MOD watersupply189's Avatar

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    Re: MM3 Error Code 14000

    Make sure on the controller box the metal studs are removed when you put the two half’s together.

    This will cause some connectivity issues.

    Try taking out the SD card and seating it back in.

    Make sure the cable is secure on the back of the monitor.


    2016 Ram 3500 CC 4x4, G56, Dr. DRD medically cured!

    2016 RAM 3500 4x4 Laramie Crew Cab
    Cummins,G56, Rough Country level, Morimoto LED fog lights, LED headlights, Lund Attitude Steps sprayed with Line-X, DRL's Activated, 35x12.50R18 Falken Wildpeak ATW3, Fuel Vapor Wheels Matte Black w/Dark Tint, A.R.E. Truck cap and swing boxes

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    More Powa! RATLIN'HP's Avatar

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    Re: MM3 Error Code 14000

    The communications "unlock" cable needs to remain plugged in.

    Check it at both ends, under the hood and under the dash.

    Sent from my SM-A505U using Tapatalk

    2015 Black Laramie CCSB 3500 SRW. Thuren Leveled With Fox 2.0 Shocks. Ride Rite Rear Air Bags With Wireless Airlift Onboard Air. 35" Toyos. All The Options Minus The Soot Cookers. RaceMe Ultra.

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    Kelvinfreitas's Avatar

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    Re: MM3 Error Code 14000

    Awesome! I got it.

    Thanks guys!

    The unlock cable end under the hood was plugged in but the wires was pulled out a bit!

    Pushed them back in and everything works as it should.


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    MOD watersupply189's Avatar

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    Re: MM3 Error Code 14000

    Quote Originally Posted by Kelvinfreitas View Post
    Awesome! I got it.

    Thanks guys!

    The unlock cable end under the hood was plugged in but the wires was pulled out a bit!

    Pushed them back in and everything works as it should.
    Awesome!

    Glad you got it figured out friend.


    2016 Ram 3500 CC 4x4, G56, Dr. DRD medically cured!

    2016 RAM 3500 4x4 Laramie Crew Cab
    Cummins,G56, Rough Country level, Morimoto LED fog lights, LED headlights, Lund Attitude Steps sprayed with Line-X, DRL's Activated, 35x12.50R18 Falken Wildpeak ATW3, Fuel Vapor Wheels Matte Black w/Dark Tint, A.R.E. Truck cap and swing boxes

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