Question

How do you get a P0175 bank 2 too rich and P0171 bank I too lean at the same time, also p01405 DPFE and P0306?

Answer 1

Hi there,

First, P0306 is a misfire on bank 2 cylinder #6. This could cause a rich code on bank 2.

P0171 could be a result of an intake leak or faulty front O2 sensor, and normally the DPFE sensor is the cause of the P1405 code. IF you take it off and shake it, sometimes there's water inside. This means it's no good.