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#1
08-11-2007, 05:31 PM
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CEL Codes p0171 and p0174
Hi Everyone. I have a 2001 Ford Ranger and the CEL has come on and gave me the following codes: p0171 and p0174. They both say "System too lean". I have ran Chevron w/techron and middle grade gas through but the light won't stay off.
Any Ideas? Thanks in Advance 
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#2
08-11-2007, 09:09 PM
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Re: CEL Codes p0171 and p0174
You may want to change your fuel filter. I if it continues after this, check your fuel pressure. You're obviously not getting fuel to the injectors like you need.
I don't know. I bet you're getting better gas mileage right now, aren't you? 
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#3
09-03-2007, 06:02 PM
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Re: CEL Codes p0171 and p0174
well i made a trip recently with it and got around 20.5mpg.
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#4
09-03-2007, 06:02 PM
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Re: CEL Codes p0171 and p0174
btw, thanks I will try that.
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