Question

I have a 2000 Ford Windstar 3.8L 6Cyl with engine codes P0171 and P0174, how to fix it?

Answer 1

P0174 Fuel trim lean Bank 2

P0171 Fuel trim lean Bank 1

Visual inspection is needed first, when you have a lean Bank code what happens is there is more air to fuel ratio, the best solution is to look and listen for any vacuum leak that may have occurred

Broken vacuum lines will allow false air to enter the system this would cause a lean code condition.

Answer 2

P0171 Ford Code - Fuel Injection System Too Lean Bank 1
Read more: https://www.autocodes.com/p0171_ford.html

P0174 Ford Code - Fuel Injection System Too Lean Bank 2
Read more: https://www.autocodes.com/p0174_ford.html