Impreza p0172 rich condition diagnosis
I am trying to diagnose a p0172 rich bank 1 code
on my 2006 Subaru impreza 2.5i and was looking
at live data for the o2 sensors so I was wondering
what the difference between o2s12(V), o2s11(V)
and o2s11(mA) is. And which one I should be
looking at and the levels they should be at.
O2s 11(V) and O2s 11(ma) are the front sensor this sensor is responsible for how the engine runs the O2 12(V) indicates how well the catalytic converter is working, so you need to watch the front O2s 11(V) sensor for diagnosis , low voltage indicates lean mixture and higher numbers indicate richer mixture, the voltage range os 0.01v to 0.99v with 0.00 full lean and 1.0 as full rich. The secondary O2 sensor will move very slowly compared to the primary sensor.
That's the value they tend to stay around.
