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Title: Why Am I Getting P0171 Code on My Toyota Corolla?
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Alright, so here’s my situation. My Corolla has been running lean (or so I’ve heard), and now I’ve got the P0171 code. Fuel mix issue, right? I recently changed the air filter, but that’s it. Do you think that’s the culprit, or am I in for something bigger like an O2 sensor failure? Really don’t wanna deal with that
 
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