P171 Code
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I have the same problem w/ my 2001 Sport Trac. P0171 Bank One... fuel too lean. My problem started when I added fuel injector cleaner without the right amount of gas in the tank and fried my O2 sensors ($125 mistake). Replaced both sensors, reset the check engine light and everythig seemed fine for about a day 1/2. Now P0171 has come back. Any thoughts on what it might be? Will clean the MAF as soon as I can find it. Oh yeah, the A/C keeps "cycling" and seems to pull my RPM's down. Probably just low on coolant, but could it be related?
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Follow up to the P171 Code Sport Trak
After changing out oxygen sensors, and a multitude of other things (cleaning the MAF sensor, air filters, etc), it turned out to be a leaking head manifold gasket - i think lower. Truck has 60k miles on it which seems a little early.
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too lean on both bank 1 and 2?
I have both codes p0171 and 0174. It means lean on bank 1 (right side) and lean on bank 2 (left side). Let me think.....Is it getting too much air from the air to fuel ratio? and is it the fuel filter? on my 2002, V6, F150. The mileage reads over 88,000.
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Joined: Jan 2004
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From: St Louis
Originally Posted by xtraflriome
I have both codes p0171 and 0174. It means lean on bank 1 (right side) and lean on bank 2 (left side). Let me think.....Is it getting too much air from the air to fuel ratio? and is it the fuel filter? on my 2002, V6, F150. The mileage reads over 88,000.
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Tyler Roberts
1997 - 2003 F150
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Sep 22, 2014 12:40 AM
