2005 Duramax LLY - Allison Trans Problem
 

The truck was in a 75hp efi live tune and went into a limp mode and threw code P0746 Pressure Control Solenoid Performance/Stuck Off and it wouldn't shift out of 3rd gear I believe. I cleared the code and it ran fine afterwards with no issues. Do I need to replace pressure control solenoid "A"? Has anyone had this same issue? Any help would be greatly appreciated.