bank 1 sensor check engine light

As a suggestion: Best to find out why the code is setting before looking for a part to replace. There is a diagnostic process that goes with every trouble code. No code indicates that a part has failed -- merely that there's a problem that must be checked into. Is this P0171? Or a different code? Is this bank 1 sensor 1 or bank 1 sensor 2? Lots of info needed -- suggest professional assistance from a tech near you. Here's a way to find a shop: www.repairpal.com/repair-shops