Question

On my Mercedes Benz C63 AMG 6.3L, how to fix P0174? The check engine light is ON

Answer 1

Hi there,

There can be several different causes for the lean fuel mixture code on bank 2. Sometimes an intake manifold gasket leak will cause the problem, also the rear O2 sensor on bank 2 as well as low fuel pressure. These all need to be tested to determine where the issue is coming from.