I had book marked DTC codes listing and for some reason they were deleted or aliens took em... looking up code P2509 for a buddys 05 3500QC any help appreciated.

Thanks

 

here is a thread with most of the codes I could dig up https://dodgeforum.com/m_984315/tm.htm

unfortuantely 2509 is not on there. . .but that will be added as soon as I hit ok.

P2509 ECM/PCM Power Input Signal Intermittent

probably have a bad ground somewhere, or the main power to the computer is loose.

 

P2509 is powerdown data lost error- diesel. If you need the diag sheet, just send a pm or post.

 

Seeme some time ago buddy killed his batteries, had them replaced, also threw P0720 output speed sensor circ error.... could be due to bad batteries. Thanks for info