4.6 Codes P0171 P0302 P0303 P0304 - Ford Truck Enthusiasts Forums

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4.6 Codes P0171 P0302 P0303 P0304

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Old 03-20-2009, 06:04 AM
quickdean quickdean is offline
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4.6 Codes P0171 P0302 P0303 P0304

New member. First post... hopefully in the right topic. I have a 2004 F-150 with 192K miles. It has always been well maintained but it just started with these codes. I have read a lot of information on this forum regarding having both P0171 and P0172 but am looking for the most common failure point when it is just one bank. I was thinking O2 sensor but based on other posts I am no longer confident of that. Thanks for the help.
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