Kept getting code P0191 on my truck, took it in to the dealer and they checked it out. Called me up and told me the FDPM was corroded, but the truck was running just fine. They are going to fix it with the new updated standoffs and its covered under my extended warr. If anyone gets that code on your truck, you better check out your FDPM.

Truck is an 07 with the flex fuel 5.4