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			After replacing the gasket, I am getting P0171/P0174 codes, but I do not have any vacuum leaks.  What could cause this? __________________ This post was auto-generated based upon a question asked on our tech article page here: | ||
|  07-15-2013, 06:25 AM | 
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| Moderator Join Date: Jul 2012 Location: New England 
					Posts: 3,189
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			Low fuel pressure or a bad MAF can also cause lean codes. Do you have an exhaust leak because that can also cause false lean codes  - Nick | ||
|  07-15-2013, 06:25 AM | 
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