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mrgrim007's avatar
mrgrim007
Explorer
Apr 12, 2021

Cummins 6.7 Injector Codes?

2014 RAM 6.7 - About a month ago I got a P020D code (#4 cylinder, possibly bad injector). Cleared to the code and hasn't come back.

A few days ago, another CEL. P020B, cylinder no. 2, same thing.

Does this mean it's time for injectors? Or do is further diagnosis needed? If it needs injectors, I might tackle them myself. Shop quoted $5,200.

12 Replies

  • spoon059 wrote:
    How many miles? Lots of people have 150-200K miles on stock injectors with the 6.7. Its possible to have 1 bad one, but 2? Unless you are up there in miles, I would suspect the injectors are fine or you just have bad luck. The fact that something happened to cause #4 injector to throw a code, but it didn't come back makes me think its not the injector, but something else.

    I would start by making sure all your wiring harnesses are in good shape and securely fastened. I'm guessing that something is loose in the injector wiring harness that is causing a voltage drop somewhere that is causing the code. The wiring harness is the first place I would look.

    At a bare minimum I would say you need further diagnosis. Good luck!


    Thanks for the reply! I'll see if I can figure out how to look at the wiring harness...

    It has 128k miles.
  • How many miles? Lots of people have 150-200K miles on stock injectors with the 6.7. Its possible to have 1 bad one, but 2? Unless you are up there in miles, I would suspect the injectors are fine or you just have bad luck. The fact that something happened to cause #4 injector to throw a code, but it didn't come back makes me think its not the injector, but something else.

    I would start by making sure all your wiring harnesses are in good shape and securely fastened. I'm guessing that something is loose in the injector wiring harness that is causing a voltage drop somewhere that is causing the code. The wiring harness is the first place I would look.

    At a bare minimum I would say you need further diagnosis. Good luck!