po171 and 174!! | Ford Explorer Forums - Serious Explorations

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po171 and 174!!

  1. G

    Plastic upper intake leak v6 4.0

    Hello to everyone. I just joined in order to shed some light on a issue I had to figure out myself and post it here in case it helps someone else down the line. I spent days researching PO171 and PO174 lean bank 1 and lean bank 2 problems. I pulled codes and here is what happened in the next...
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