I looked at the connector box and replugged the passenger side front sensor in. Everything looked fine. Cleared the codes but they came back a few miles later. I think both codes are for bank one, pre-cat sensor. I think I'm going to try to replace that sensor. Looks like it will be a pain to get access to it. Can't get to it from above like most pre-cat sensors, but it's also hard to reach from below, even with all the covers removed.

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