PO171 my truck is losing power as im driving sometimes shuts off

Question

code that is reading is PO171. i have installed new O2 censors air filter and clean the MAF sensor and checked for vacum leaks with none found.

Answer 1

P0171 Lean fuel trim Bank 1

Fuel pressure can cause this situation , or a plugged exhaust on one side of the Bank. Have the fuel pressure chech the specification are Key on engine off 55-62 psi.