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Trouble Codes 98 F-150

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Old 03-03-2008, 01:46 PM
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Default Trouble Codes 98 F-150
Any ideas on these trouble codes?
P0171
PO174
say's both banks are reunning lean. I'm thinking H02S sensors.
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Old 03-03-2008, 03:12 PM
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That or also check your fuel filter.
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Old 03-28-2008, 10:35 PM
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try this

http://autorepair.about.com/cs/faqs/l/bl903d.htm
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Old 03-29-2008, 10:16 AM
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Have you recently put a new air filter or a cold air intake? When i did mine i was getting a lean code at about 4500 or 5000 rpm.
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Old 03-29-2008, 02:28 PM
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No I haven't. Thanks for the info though.
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