P2504 Code: Meaning, Causes, and Symptoms | OBD2 Codes

P2504 – Charging System Voltage High

 

P2504 Possible Symptoms

 

Engine Light ON (or Service Engine Soon Warning Light)

 

P2504 Possible Causes

 

Faulty Generator (Alternator),Generator harness is open or shorted,Generator circuit poor electrical connection,Faulty Powertrain Control Module (PCM)

 

P2504 Description

 

The Powertrain Control Module (PCM) monitors the charging system for changes in the output voltage. The PCM set the OBDII P0504 code when the output voltage is out of factory specifications.