Fault codes PO171 PO174 - Ranger-Forums - The Ultimate Ford Ranger Resource


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Old 09-15-2010
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Fault codes PO171 PO174

Have a 2000 Ranger with the CE light on and the above codes...I have removed and cleaned the MAF sensor but the light remains on. All help is appreciated. Doc

Last edited by dochawken; 09-15-2010 at 10:52 PM. Reason: spelling
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Old 09-16-2010
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what motor do you have...sounds like theres a vac leak somewhere or a o2 sensor went bad
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Old 09-16-2010
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yes indeed...it was an O2 sensor....have 3.0 6cyl. Thank you for the reply, I appreciate it. Doc
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