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U0101 Diagnostic Trouble Code Discussion for April 2020

Lost Communication With TCM


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Trouble Ticket Help Requests for DTC U0101
Help Request Posted
2014 Ram 4500 SLT 6.7L MIL Lamp on, Limp in mode VIN: 3C7WRLEL9E
U0101: Lost communication between ecm and def modules. Hi thanks in advance for any insight. I have repaired the lost comm. Problem finding a pushed out pin at connector i200 and a broken wire at fuse 18 in the pdc. Which brought about the last 2 dtc's . I started with p21c4 following diagnostic steps for that...
April 19, 2020
2014 Ram 4500 SLT 6.7L MIL Lamp on, Limp in mode VIN: 3C7WRLEL9E
U0101: Lost communication between ecm and def modules. Hi thanks in advance for any insight. I have repaired the lost comm. Problem finding a pushed out pin at connector i200 and a broken wire at fuse 18 in the pdc. Which brought about the last 2 dtc's . I started with p21c4 following diagnostic steps for that...
April 21, 2020