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Home >> Chrysler >> 2011 >> 300 C, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 508 (3.6L - DTCS P0461 To P0643) >> Diagnosis And Testing >> P0643-Primary 5-Volt Supply Circuit High >> Possible Causes

Possible Causes

WARNING: This page is about a different car, the 2013 Dodge Avenger and 2013 Chrysler 200. However, it is still accessible from the selected car via links, so may be relevant.
Possible Causes
(F855) 5-VOLT SUPPLY SHORTED TO VOLTAGE
(K854) 5-VOLT SUPPLY CIRCUIT SHORTED TO VOLTAGE
POWERTRAIN CONTROL MODULE (PCM)

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to  STANDARD PROCEDURE  . 

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