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    CP4 to CP-ISB21S3 (revised CP3) change for 2021 6.7L Diesel Trucks -- Merged Threads

    My truck is currently in the shop under warranty waiting for a kit to arrive to replace the blown CP4 after 12000. What are they replacing just another CP4 that may fail again. Or is there a retro kit or anything on the new install to prevent that from happening again
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    Ram cp4 failure thread - Post all CP4 failures here DO NOT start a new thread.

    Good evening ram owners. Hope everyone is not as angry as me. So on June 22 I bought a certified pre owned 2020 mega cab DRW longhorn from Miami lakes auto mall. Truck had 10340 miles. Not 10 days later I had just loaded 2 cars into my 34 ft enclosed car hauler when about one mile later the...
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