Question

On my 2005 Dodge Cummins, what is the engine code P2509?

Answer 1

P2509 Dodge - Engine Control Module/Powertrain Control Module Power Input Signal Intermittent

Read more: https://www.autocodes.com/p2509_dodge.html

Poor battery voltage or battery connection could cause the P2509 code. Start by checking the car battery and connection, if the battery is OK, then you may have to have the dealer reprogram the control unit for you.