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U0100 Diagnostic Trouble Code Discussion for April 2021

Lost Communication With ECM


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Trouble Ticket Help Requests for DTC U0100
Help Request Posted
2009 Dodge Ram 5500 6.7L No Start VIN: 3D6WC76L99
U0100: Lost comunication with ecm/pcm. Was asked by a friend to look into this diesel truck, has been siting for almost a year and they installed engine and now it will not start after engine was removed and resealed. No crank and first thing i have done is replace batteries. Found a few missin...
April 24, 2021