Question about 2003 Ford Explorer Sport
This fords have very comun problems with maf sensors geting contaminated, if you have not or can hear any vacium leaks, the problem is goin to be a conataminated mas air flow snsor (maf)
allow the engine to cold down for at least 15minutes and the remove the air filter hosing and inside has to have a sensor, clean the two liitle resistors inside with brake or carburetor cleaner, allow it to dry and reinstall it.
if this inf help please mark it as fixya ranking after you try what i said
Posted on Jun 30, 2008
The po171 code is more than likely a lazy oxygen sensor on the drivers side of veh it will be the upstream sensor as there are 2 sensors on each side of the engines exaust upstream being the first one inline eg farthest from muffler as fpr the po174 its the other side oxygen sensor eg passenger side upstream as well these sensors become slow in response time causing intermitent codes before changing these sensors try using highest octane fuel for the next 3 fill ups and change oil if u see no change in intermitent codes then go to local parts store and purchase 2 oxygen sensors both upstream and replace both
Posted on Jun 30, 2008
SOURCE: my check engine light came
This means both banks have a lean condition. Most likely if you have a 4.0 SOHC motor your upper intake is sucking in air at the orings at the bottom of the intake. These are really bad about when they are cold in the morning the shrink and let air get by and after the engine warms up the orings soften and seal off.
Posted on Apr 29, 2011
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Jan 27, 2016 | Cars & Trucks
Dec 09, 2015 | Cars & Trucks
Sep 27, 2013 | 1999 Ford Explorer
Apr 29, 2011 | Ford Explorer Sport Cars & Trucks
Apr 05, 2010 | 2003 Ford Expedition
System Too Lean (Bank 2)
Basically this means that an oxygen sensor in bank 2 detected a lean condition (too much oxygen in the exhaust.
Note: This DTC is very similar to P0171, and in fact your vehicle may show both codes at the same time.
Dec 17, 2009 | 2002 Ford Windstar Cargo
Sep 22, 2009 | 2003 Ford Explorer Sport Trac
May 19, 2008 | 1999 Ford Explorer
Nov 28, 2015 | 2003 Ford Explorer Sport
Aug 02, 2015 | 2003 Ford Explorer Sport
1,658 people viewed this question
Usually answered in minutes!