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2013 1.8L AT 97k miles
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Those codes are pointing to your downstream o2 sensor (B1S2=bank 1 sensor 2. B1S1 is the one that's right in your face when you open the hood) which if I recall is at the back of the engine, centered, straight down. You'll need 175 feet of extensions and an o2 socket to get at it unless you can get it from underneath
 
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