[b5aar]

Hi Guys

oxygen sensor (new oem) drives to rich mixture....10to1, 9to1.....barely idles etc

warm up normal...as soon as system transitions to closed loop goes rich,,,,unplug sensor and bounces back to 12to1 - 12.5to1...idle steady....been driving with it unplugged.....Car drives fine, cruising, under boost etc



Condition started "all of a sudden" a month and a half ago...while i was driving before the MD ice/salt/tundra came......thought it was the old sensor so ordered a new one.....same problem

I know not a tragedy....richer mixture is nicer pre-boost......however like the better mpg cruising and idle was a bit more stable when sensor was working......also just concerned may be a problem that will affect something else in the future

any ideas? as always grateful for your knowledge