Can't get rid of P0171

[dog2525]

My family has a 02 Camry that we bought couple years ago when it had 20K miles on it. Currently the car has 100K and for the past 20K or so I have been battling to get rid of this CEL code P0171. The car is all stock and has no problem what so ever except for this. I have changed the air filter, spark plugs, sea-foamed the car and cleaned the throttle body and MAF sensor. Read on this forum that having an intake is a cause for this problem, but as I said its all stock. No idle problems, and car runs smooth. They say it could be a faulty MAF sensor or O2 sensor. I want to see if there is anything else I can try before replacing those parts. As far as gas milage goes, I am not sure how much mom gets on a tank, but is not ridiculously low.

Thanks.

[OpticNerve]

Dog, Got a great gift for Father's Day. Check out the Innova Equus 3100- auto scanner. WalMark sells them online for around 80 bucks. Advance Auto Parts also has good ones reasonably priced. You get get a whole lot of data besides the definition of the CEL code. Over time your reading and searching will teach you how to use it. Get a case for it too.