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Most of the cars I've worked on with both those codes set has turned out to be a vacuum leak. Un-metered air getting into the intake somewhere after the MAF sensor would make it run lean. I usually spray around the intake and around the vacuum lines with carb cleaner. When the idle changes when you spray a certain spot thats where the leak is.
Could be something fuel or sensor related but most of the ones I see turn out to be vacuum leaks.
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