Question

How do I fix the engine codes P0171 and P0174 on my 2005 Ford F150 4.6L?

Answer 1

Hi there,

These codes are for a lean fuel mixture on both sides of the engine. Most of the time when both sides are affected the problem is either the mass air flow sensor or a low fuel pressure issue.

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