2004 CHEVY 2500 DURAMAX DIESEL P0641

Question

2004 CHEVY 2500 HD DURAMAX DIESEL WHAT CAUSES THE P0641 CODE TO APPEAR. WHY DOES THE ENGINE GO INTO REDUCED POWER MODE?

Answer 1

Hi there,

This code indicates an issue with the ECM. Here is some info for you.

P0641 CHEVROLET - 5 Volt Reference Voltage Incorrect

Read more: https://www.autocodes.com/p0641_chevrolet.html