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Home >> Chrysler >> 2011 >> 300 C, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 436 (6.7L Diesel - DTCS P2299 To U3017 - 2500 Hd & 3500 Hd) >> Diagnosis And Testing >> P2509-Pcm/Pcm Power Input Signal Intermittent >> Possible Causes

Possible Causes

WARNING: This page is about a different car, the 2013 RAM 3500 HD and 2013 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  STANDARD PROCEDURE  .