Drove last night got it all warmed up with the new sensor and I am still plagued by the rich reading.

So it is definitely running rich, it is not just a bad reading.

Ideas where to go from here?

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2016 Monsoon Gray Audi Allroad - 21k
2008 Black Mercedes E350 4Matic Sport - 131k
2014 Jeep Wranger Unlimited Sahara - 62k
2003 Gray Mercedes ML350 - 122k