Question

On my 2010 Jeep Patriot 2.4L, what is the engine code P0171?

Answer 1

Hi there,

This code means there is a lean fuel mixture on bank 1. The most common causes for this code on a single bank is an intake manifold leak or a faulty O2 sensor. Sometimes an exhaust leak can cause this as well because it fools the O2 sensor.

Answer 2

P0171 JEEP Code - Fuel System 1/1 Lean
Read more: https://www.autocodes.com/p0171_jeep.html