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Home >> Chrysler >> 2011 >> 300 C, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1575 (6.7L Diesel - DTCS P24A2 To U3017 - 2500 Hd) >> DTC Troubleshooting >> P2509-Pcm/Pcm Power Input Signal Intermittent >> Possible Causes

Possible Causes

WARNING: This page is about a different car, the 2017 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
Possible Causes
POOR CONNECTIONS AT THE BATTERIES
BATTERIES DISCONNECTED WITHIN TEN MINUTES AFTER KEY OFF
LOW BATTERY VOLTAGE
OPEN FUSED B+ TO PCM
OPEN GROUND CIRCUIT
BATTERY POSITIVE SHORTED TO OTHER CIRCUITS
RETURN CIRCUIT SHORTED
BATTERY POSITIVE SHORTED TO GROUND
DEFECTIVE BATTERY

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to  PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE  .