Error code P 2509 - Dodge Cummins Diesel Forum
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post #1 of 5 (permalink) Old 01-01-2007, 02:34 PM Thread Starter
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Error code P 2509

I searched this site to find that this particular error code is: CM/PCM Power Input Signal Intermittent.

What does this mean exactly? Is the truck computer not getting the steady voltage necessary? Has anyone else had this issue, and if so what was the remedy?

Thanks for any help!


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post #2 of 5 (permalink) Old 01-01-2007, 03:48 PM
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That is a new one on me. That does sound like it is a poor power supply condition though. Have you tried clearing it and seeing if it comes back? Maybe try wiggling wires around and see if there is a loose one? I don't know, just throwing suggestions out there for you.
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post #3 of 5 (permalink) Old 11-05-2009, 10:15 PM
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I got the same 2509 code along with the 602 code. i put in 60 horse injectors 10 months ago?....maybe that's it???also, i noticed more black smoke at 1100-1800rpm when I hit the fuel....any ideas?
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post #4 of 5 (permalink) Old 11-05-2009, 10:19 PM
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Clean your battery terminals.

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post #5 of 5 (permalink) Old 01-06-2012, 10:32 AM
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I just started getting this code as well, 05 3500 with brand new batteries and clean terminals (greased) and I'm still pulling this code and the motor idles poorly. Where is the ECM plug p(s) so I can unplug a few times to see if its a poor connection?
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