P0171 and P0174? Why am I getting these codes?
I have a 2004 Ranger Edge, 3.0L V6. Whenever I'm getting on the freeway the check engine light comes on and when i check the codes its always P0171 and P0174. After looking these up I found that the are Lean Bank 1 and Lean Bank 2. Whats causing this? Do I need to clean something? Do I need to replace something? Help please.