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Home >> Chrysler >> 2011 >> 300 C, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 94 (6.7L Diesel - DTCS P2000 To U1601 - 2500 & 3500) >> Diagnosis and Testing >> P2509-Pcm/Pcm Power Input Signal Intermittent >> Possible Causes

Possible Causes

WARNING: This page is about a different car, the 2011 RAM Pickup. 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
BATTERY

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to  PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE - 6.7L  .