Question

What can I do to fix codes p0171 and p0174 on my 2004 Lincoln Towncar?

Answer 1

The P0171 and P0174 codes are triggered when the engine is running too lean. The possible cause for the engine running lean are:

• Intake leak
• Bad air flow meter
• Clogged fuel filter
• Bad fuel pump.

 P0171 LINCOLN - Fuel Injection System Too Lean Bank 1
Read more: https://www.autocodes.com/p0171_lincoln.html

P0174 LINCOLN - Fuel Injection System Too Lean Bank 2
Read more: https://www.autocodes.com/p0174_lincoln.html