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po171-- system to lean ( bank one ).-this could be a vacuum leak, fuel pressure could also cause a problem. if a leaking vacuum hose you will hear a hissing sound from engine compartment. most of the problems can be corrected by just cleaning the maf sensor. you can buy a can of maf sensor spray at any auto parts store and just follow directions on can. on v6/v8/and v10 bank 1 is the bank that the # 1 plug is at. good luck!! i cleaned my maf sensor and it helped alot.

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13y ago
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Q: What does the trouble code po171 mean for 2000 Chevy Malibu?
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