Question

Ford Focus ST 2.0L Turbo with engine code P0035 and P0171, what is the problem?

Answer 1

HI there,

This code is for the turbo bypass valve circuit high. Generally speaking this usually means the bypass valve for the turbo is stuck open. This will result in the lean fuel mixture code of P0171 also, so check the bypass valve.

Answer 2

P0035 Ford Code - Turbocharger BP0035 Ford Code - Turbocharger Bypass Valve 'A' Control Circuit High
Read more: https://www.autocodes.com/p0035_ford.htmlypass Valve 'A' Control Circuit High

P0171 Ford Code - Fuel Injection System Too Lean Bank 1
Read more: https://www.autocodes.com/p0171_ford.html