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sprinkles08, Chrysler/Dodge/Jeep master tech
Category: Dodge
Satisfied Customers: 21413
Experience:  ASE Master and Advanced Certified, Chrysler/Dodge/Jeep Master Certified, Trans and Hybrid Specialist
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I have 2012 ram 4/4 2500 it starts runs for about 20 minuets

Customer Question

i have 2012 ram 4/4 2500 it starts runs for about 20 minuets and shuts off and wont start for a couple of hours and does the same thing again when it shuts down it has full power turn the key and wont do nothing. changed the battery changed the starter cam shaft sensor and ignition module
JA: Have you changed a battery before?
Customer: yes two years ago the truck has 20007 miles on it
JA: Are you fixing your 1500 yourself? What have you tried so far?
Customer: its a 2500 a shop is fixing it and they do not know what to do next. their scanners reads that it lost communication
JA: Anything else you want the mechanic to know before I connect you?
Customer: no
Submitted: 1 month ago.
Category: Dodge
Expert:  sprinkles08 replied 1 month ago.

Hello and welcome to JustAnswer!

There are many things that could cause the problem you're describing. It sounds as if the powertrain control module is going down. If the PCM isn't awake at the time of the no start then it won't communicate with a scan tool, along with not being able to control any engine functions.

If the PCM won't communicate at the time of the no start condition then the first thing that needs to be done is test it's power and ground feeds. If they're present then the PCM can be condemned.

If a power or ground is missing then that circuit will need to be investigated further. You could have a wiring issue or internal failure in the TIPM causing a loss of power or ground.

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