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Hello everyone. My CEL popped up and the code shows P0171. From the way my car sounds it might be a vacuum leak but I'm not 100% sure. Any tips or ideas on figuring it out?
 

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Electromagnetic Wave :-h
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There are tons of threads on this. A vacuum leak is one of several possible causes. Year & model info would also be helpful. But, if you can hear a leak, it shouldn't be that hard to find.
 
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