Serious Explorations Ford Explorer and Ranger Message Board
#1 Resource for Ford Explorer and Ranger Owners - By Enthusiasts, for Enthusiasts.


Ford Explorer Generation Guide

EF Swag Store 2015 Ford Explorer Forums Elite Membership Chat Room My Posts Reviews Explorer Photo Gallery
Go Back   Ford Explorer and Ranger Forums "Serious Explorations" > Ford Explorer Ranger Repair - Troubleshooting - Modifications & Detailing Forums > 2006 - 2010 Explorer Mountaineer 4th Generation > Stock 2006 -2010 Explorers

Notices

Stock 2006 -2010 Explorers Stock 2006 -2010 Ford Explorer Forum. Problem solving, maintenance, TSB, service bulletins, owner reviews, specifications.

4.6 3v po171 and po174

Reply
 
Thread Tools
Old 04-09-2012, 09:25 PM   #1
mcauliffeinfl
hickory nc
06 exp limited 4x4 v8...
 
Join Date: Feb 2005
Posts: 8

Vehicle Specs

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
(Original Poster)
4.6 3v po171 and po174

Hello all, I have an 06 explorer limited with 82,000 miles that started kicking po171 and 174 the last couple of days. I installed a k&n fipk about 3k miles ago.
Ive been poking around here and on the web and every one seems to think its a vacuum leak, however I have sprayed the engine down with carb cleaner and I can not get the idle to increase. The engine almost feels like it is missing not really under load but more when you let off the throttle. I plan on getting some maf cleaner tomorrow to try, even though I pulled it out tonight and it looks spotless. All of the references to this problem point back to the older explorers with the 4.0 or the 2v 4.6, I cant really find any info on the newer stuff. Thanks in advance!!
mcauliffeinfl is offline   Reply With Quote
( Join the Elite Explorers )

For only $20 per year you can become an Elite Explorer member. Explorer Forum has probably saved you that much already, and will continue to save you money as you learn how to diagnose and fix problems yourself, and learn which modifications really work without having to experiment on your own. Elite Explorer members can change the forum "styles" to eliminate most ads, including blue underlined links, and no ads on photos. Other benefits include the ability to store 1000 Private Messages, upload photo attachments directly to your posts and to our Photo Gallery and more. Join the Elite Explorers today.


Old 04-09-2012, 10:37 PM   #2
LONO100
Bay Area CA
03 sport trac XLT
 
Join Date: Mar 2011
Posts: 3,179

Vehicle Specs

Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 18 Post(s)
had the same problem. ranchero saved me major time with this link:

http://www.explorerforum.com/forums/...d.php?t=314670

try to find this elbow and get a good look at it. it might not even looked cracked on first inspection, so take it off and get a real good look at it.
LONO100 is offline   Reply With Quote
Old 04-10-2012, 10:03 PM   #3
mcauliffeinfl
hickory nc
06 exp limited 4x4 v8...
 
Join Date: Feb 2005
Posts: 8

Vehicle Specs

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
(Original Poster)
apparently my explorer is different being a 2006 3 valve, mine does have a hose there but is a solid unit from bend to bend, anyhow I took it off and put the ole sucker on it and it held tight for a good while. I checked all the vac hoses that I could and they all visually look good. Hopefully there are some other suggestions out there. It also appears the gas mileage is suffering significantly I will get some exact numbers on the next tank and I will keep you posted.
mcauliffeinfl is offline   Reply With Quote
Old 04-11-2012, 09:01 PM   #4
mcauliffeinfl
hickory nc
06 exp limited 4x4 v8...
 
Join Date: Feb 2005
Posts: 8

Vehicle Specs

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
(Original Poster)
Well I cleaned the mass air sensor and still no better any body have any suggestions?
mcauliffeinfl is offline   Reply With Quote
Old 04-14-2012, 08:11 PM   #5
chefy
stp mn
2006 exlorer xlt 4.6
 
Join Date: Oct 2011
Posts: 9

Vehicle Specs

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
i have the exact same problem. i have an 06 with a 4.6. i put a k&n intake in and after about 300 miles it popped both codes. i tried maf cleaner and even a new maf neither of those worked. i ended up getting a tube of k&n sealing grease and i put it on all the seams. so far its worked. ill let you know if it stays that way. as far as gas milage goes, mine hasn't changed from before i installed the intake. im averaging 16.5 mph.

Last edited by chefy; 04-14-2012 at 08:18 PM. Reason: added more information
chefy is offline   Reply With Quote
Old 04-14-2012, 08:36 PM   #6
JoePieper
Louisville, KY
2002 mercury Mountaineer
 
Join Date: Mar 2012
Posts: 10

Vehicle Specs

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
P0171 System Too Lean (Bank 1)

Basically this means that an oxygen sensor in bank 1 detected a lean condition (too much oxygen in the exhaust). On V6/V8/V10 engines, Bank 1 is the side of the engine that has cylinder #1.

Note: This DTC is very similar to P0174, and in fact your vehicle may show both codes at the same time.

P0174 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). On V6/V8/V10 engines, Bank 2 is generally the side of the engine that doesn't have cylinder #1.

Note: This DTC is very similar to P0171, and in fact your vehicle may show both codes at the same time.

Now go check your O2 sensors. My buddy's 98 Ex 4.0 had these codes. Changed sensors and it fixed the prob.

So cleaning the MAF wont neccesarily cure it. There are sites on the internet where you can look up these codes. You should also have a book that came with your scanner. Or go to Autozone, O'reilly, Advance, NAPA etc. They can read them for you and tell you what they are.
JoePieper is offline   Reply With Quote
Old 04-14-2012, 09:39 PM   #7
mcauliffeinfl
hickory nc
06 exp limited 4x4 v8...
 
Join Date: Feb 2005
Posts: 8

Vehicle Specs

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
(Original Poster)
I changed the maf today and so far it seems to be better I probably put 150 miles on her today and no light yet. I got almost 18.5 mpg today but I have the intake and the hypertech programmer.
mcauliffeinfl is offline   Reply With Quote
Old 04-23-2012, 08:23 AM   #8
mcauliffeinfl
hickory nc
06 exp limited 4x4 v8...
 
Join Date: Feb 2005
Posts: 8

Vehicle Specs

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
(Original Poster)
Well its been a couple weeks and now the cel is back on. Ive ordered a couple of downstream o2's from Rock Auto. Anybody else have any suggestions?
mcauliffeinfl is offline   Reply With Quote
Old 04-29-2012, 09:10 PM   #9
mcauliffeinfl
hickory nc
06 exp limited 4x4 v8...
 
Join Date: Feb 2005
Posts: 8

Vehicle Specs

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
(Original Poster)
well i changed the o2 sensors and the cel came back on within 50 miles... running out of things to try here anybody else have any suggestions??? I feel like im talking to myself...
mcauliffeinfl is offline   Reply With Quote
Old 04-30-2012, 02:16 AM   #10
LONO100
Bay Area CA
03 sport trac XLT
 
Join Date: Mar 2011
Posts: 3,179

Vehicle Specs

Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 18 Post(s)
i dont think your sensors are off, they are probably doing their job. if you installed a new intake, somewhere there isnt a clamp tightened down enough and too much air is being sucked in giving you a lean code.
LONO100 is offline   Reply With Quote
Old 05-01-2012, 06:08 PM   #11
mcauliffeinfl
hickory nc
06 exp limited 4x4 v8...
 
Join Date: Feb 2005
Posts: 8

Vehicle Specs

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
(Original Poster)
after double triple and quadruple checking and hosing the entire intake down with carb cleaner there is no leak on the intake...
mcauliffeinfl is offline   Reply With Quote
Old 05-22-2012, 08:49 AM   #12
mcauliffeinfl
hickory nc
06 exp limited 4x4 v8...
 
Join Date: Feb 2005
Posts: 8

Vehicle Specs

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
(Original Poster)
any other suggestions????
mcauliffeinfl is offline   Reply With Quote
Old 05-30-2012, 12:09 PM   #13
chefy
stp mn
2006 exlorer xlt 4.6
 
Join Date: Oct 2011
Posts: 9

Vehicle Specs

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
i put the k&n sealing grease on each connection i also put hose clamps on every connection. that was in mid april and its now june. i've yet to have the codes come back. it was a cheap fix and it worked.
chefy is offline   Reply With Quote
Old 05-30-2012, 01:23 PM   #14
06bluez
'10 Sport Trac Adrenalin
 
Join Date: Mar 2009
Posts: 234

Vehicle Specs

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 3 Post(s)
Did you reconnect the breather tube from the passenger valve cover? what did you do with the hose that connects to the stock intake tube from the brake booster line?
06bluez is offline   Reply With Quote
Reply



Suggest this thread to friends:

Similar Threads
Thread Thread Starter Forum Replies Last Post
PO171, PO174, PO304, and PO442 at the same time! Ideas... djp2233 Stock 1995 - 2001 Explorers 4 05-30-2012 07:48 AM
New one. Had po401. Changed DPFE. 36 hours later I have po171 and po174? Joey P EEC V 5 01-24-2009 06:17 PM
DTC PO171 and PO174 om '97 X arby dar Stock 1995 - 2001 Explorers 5 12-04-2006 09:12 PM



Join the "Elite Explorers" Today!



Search Explorer Forum


Top of Page

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 08:59 AM.



US Flag
We Support Our Troops!

Explore the site!


Copyright 2014 - 1996 Rick Horwitz Photography



Ford Motor Company is not involved in the management of this site in any way.



All tips on this site are for use at your own risk and discretion.

Modifying the suspension on any vehicle will cause changes to its handling characteristics.



Vendor Tools vBulletin Plugins by Drive Thru Online, Inc.