2009 Chevrolet Avalanche 5.3L with engine code P0641, Could this cause the issue?

Question

Truck experiences reduced engine power service stabilatrack and DTC of p0641. I have also had P0107 & P0641 once before. But usually just the P0641. The problem has happened once after running through the car wash and once when raining. Reset the code right away and problem is gone for a another couple of months. I have wiggled the wires (while the engine is running) on all the sensors on the 5v bus with the exception cam position and the Fuel Tank Pressure and cannot get the problem to re- occur. I have read of a recall for the fuel system control module due to water intrusion but have not been contacted by GM. Could this cause the issue?

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