2008 Jeep Grand Cherokee with engine code P2504, what's this problem, and how to fix it?

Question

Hi,

My car shows this code P2504, it can not start at the morning i did change the battery but same problem, I tried to change the alternator but the same code appeared, what's this problem, and how to fix it?

thanks

Answer 1

HI there

This code is for high charging system voltage. This can be the result of a faulty PCM. The PCM controls the voltage put out by the alternator. Since the alternator replacement didn't solve the problem, it's likely the PCM.

P2504 JEEP - Charging System Voltage High
Read more: https://www.autocodes.com/p2504_jeep.html