Going down the road and shut off wait about 2 minute and start to back i had a code scanner done and the codePO601 pop up what do I need to do

P0601 indicates that testing involving the transmission control module (TCM) is required to determine what has malfunctioned. There Is no way to know until testing is performed. Use this link to find some shops near you that can help with your concern: www.repairpal.com/repair-shops