Question

I have the engine code P0171 and P0174 code on my Chevrolet, what is the meaning?

Answer 1

Hi there,

This code is for a lean fuel mixture on bank 1. This can be caused by a faulty front O2 sensor, an intake manifold leak or a possible issue with the mass air flow sensor.

Answer 2

P0171 CHEVROLET - Fuel Trim System Lean Bank 1
Read more: https://www.autocodes.com/p0171_chevrolet.html

P0174 CHEVROLET - Fuel Trim System Lean Bank 2
Read more: https://www.autocodes.com/p0174_chevrolet.html