Question

I got the engine code P0171 system to rich on my 2006 Scion tC, how can I fix it?

Answer 1

Hi there,

This code is actually for bank 1 to lean, not rich. This can be caused by several things. This includes low fuel pressure, a faulty mass air flow sensor, intake manifold leaks and a problem with the front O2 sensor.

Answer 2

P0171 Scion Code - Fuel Trim System Too Lean Bank 1
Read more: https://www.autocodes.com/p0171_scion.html