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MrBmx
 Post subject: 2003 Mazda Protegé5 p0171 help?
PostPosted: Mon Jul 27, 2009 2:42 pm 
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Joined: Mon Jul 27, 2009 2:37 pm
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so i got my car looked at because the check engine light,comes up with "oxygen too lean bank 1" i go to the auto store and the guy asks me upstream or downstream? and i have no clue does any body know what one it would be? any help is greatly appreciated


Brian
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 Post subject: 2003 Mazda Protegé5 p0171 help? 
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jpb
 Post subject: Re: 2003 Mazda Protegé5 p0171 help?
PostPosted: Mon Jul 27, 2009 5:08 pm 
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Joined: Wed Oct 17, 2007 9:29 pm
Posts: 76
Start here.http://www.obd-codes.com/p0171
Clean the MAF and check for vacuum leaks.
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