check engine light code p071

Question

I"ve had a major tunue-up, O2 sensor and MAF sensor replaced. Code keeps coming back. Also put in dry gas. What else could this be?

Answer 1

Hi there,

You can get the P0171 lean fuel mixture code with an intake manifold gasket leak and also if the fuel pressure is to low. Once in a while I see the issue with a faulty rear o2 sensor causing the problem as well.