99 Windstar Fault Codes P0171 & P0174 - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars
Ford Forum Ford Forum

» Auto Insurance
» Featured Product
» Wheel & Tire Center

Go Back   Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars > Ford Trucks | Utes | Vans |SUVs | Crossovers > Ford Vans and Mini Vans | Ford Aerostar | Ford Freestar | Ford Galaxy | Ford Windstar
Register Home Forum Active Topics Photo Gallery Auto Loans Garage Mark Forums Read Auto Escrow

Ford Vans and Mini Vans | Ford Aerostar | Ford Freestar | Ford Galaxy | Ford Windstar Forum for discussion of all Ford Vans and Ford Mini Vans such as the Ford Aerostar and Ford Freestar.

FordForums.com is the premier Ford Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools Display Modes
Old 07-14-2003, 18:34   #1 (permalink)
rfmlin
Guest
 
Posts: n/a
Question 99 Windstar Fault Codes P0171 & P0174

My 99 Windstar (3.8L engine) check engine light went on. The fault codes are P0171: System Too Lean (Bank 1) and P0174: System Too Lean (Bank 2). In some of the other forum discussions I've seen similar references where people have identified the oxygen sensor to be the culprit. Does Bank 1 and Bank 2 refer to the front and rear oxygen sensors or something else? Any other suggestions on what might be wrong?
  Reply With Quote
Sponsored Links
Advertisement
 
Old 07-14-2003, 19:44   #2 (permalink)
***** Idiot....
 
LunaticSVT's Avatar
 
Join Date: Feb 2001
Location: The Sticks of Central TX
Posts: 10,561
Re: 99 Windstar Fault Codes P0171 & P0174

Actually getting an error code P0171 and P0174 means that the air/fuel mixture is too lean. Most likely due to one or more of the following....

Dirty air filter, loose oil dipstick, dirty/defective MAF, dirty injectors, vacuum leak around the intake manifold, a loose vacuum hose, evaporated emmissions purge control valve could have a wire connector disconnected, or possibly bad O2's.

The Bank System refers to the following.

Bank one will line up with the number one cylinder and bank two will line up with the number 2 cylinder of your engine. From there you will have Sensor 1 which is the sensor prior to the Cat and Sensor 2 which is behind the cat.

Hope that helps.
LunaticSVT is offline   Reply With Quote
Old 07-15-2003, 08:09   #3 (permalink)
rfmlin
Guest
 
Posts: n/a
Re: 99 Windstar Fault Codes P0171 & P0174

Thanks LunaticSVT That helps a lot. I'll go through each one of those items you listed. Does the code reset itself after ever engine start or do I have to do something to reset it? In other words, once the problem is resolved, will the check engine light just go off?
  Reply With Quote
Old 07-15-2003, 10:32   #4 (permalink)
***** Idiot....
 
LunaticSVT's Avatar
 
Join Date: Feb 2001
Location: The Sticks of Central TX
Posts: 10,561
Re: 99 Windstar Fault Codes P0171 & P0174

no you will have to reset it. If I recall on the Windstars you can reset the computer by disconnecting the battery for 30 min. and then connect again.

This should clear the CEL.
LunaticSVT is offline   Reply With Quote
Old 07-17-2007, 15:01   #5 (permalink)
Registered User
 
Join Date: Jul 2007
Posts: 1
Re: 99 Windstar Fault Codes P0171 & P0174

I have the same problem as above. However, I changed the C2's,the fuel injectors blown out, changed the MAF, had it checked for seal problems and for leaks, still the light remained even after I had the battery disconnected. Now what?
warriorspoon7 is offline   Reply With Quote
Old 08-13-2007, 17:15   #6 (permalink)
Registered User
 
Join Date: Aug 2007
Posts: 2
Re: 99 Windstar Fault Codes P0171 & P0174

Quote:
Originally Posted by rfmlin
My 99 Windstar (3.8L engine) check engine light went on. The fault codes are P0171: System Too Lean (Bank 1) and P0174: System Too Lean (Bank 2). In some of the other forum discussions I've seen similar references where people have identified the oxygen sensor to be the culprit. Does Bank 1 and Bank 2 refer to the front and rear oxygen sensors or something else? Any other suggestions on what might be wrong?
the bank 1 sensor is under the front manifold.the bank 2sensor is in the cat.converter change both of these and that should solve your problem..
sparkyele69 is offline   Reply With Quote
Old 08-13-2007, 17:23   #7 (permalink)
Registered User
 
Join Date: Aug 2007
Posts: 2
resetting the computer after your disconnect the positive battery cable

i disconnect the positive battery cable to clean it.and went to get this vehicle inspected an the inspector said that the moduals wernt responding an i had to drive the car awhile before it will reset itself.so i did that for a week and half 350+ miles and went back to him to inspect.and he said that they are still not responding.so i checked for a blown fuse under the console and under the hood and nothing. anybody got any suggestion???????? drive with no inspection....
sparkyele69 is offline   Reply With Quote
Old 12-02-2008, 09:04   #8 (permalink)
Registered User
 
Join Date: Dec 2008
Posts: 2
Re: 99 Windstar Fault Codes P0171 & P0174

Quote:
Originally Posted by LunaticSVT View Post
no you will have to reset it. If I recall on the Windstars you can reset the computer by disconnecting the battery for 30 min. and then connect again.

This should clear the CEL.


Actually,i tried that and it didn't work.I went to autozone and bought an OBD2 diagnostic computer and shut the light off from there.
rjayme7252007 is offline   Reply With Quote
Sponsored Links
Advertisement
 
Reply

  Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars > Ford Trucks | Utes | Vans |SUVs | Crossovers > Ford Vans and Mini Vans | Ford Aerostar | Ford Freestar | Ford Galaxy | Ford Windstar



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

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
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Checking fault codes KingKurt General Tech 7 05-04-2003 13:09
Fault codes that don't exist MustardX General Tech 25 10-25-2002 04:16
EF Fault Codes (EECV) XR_Strider_GuY E-Series Falcons 4 10-23-2002 19:45
2004 Ford Windstar To Provide Even More Safety, Comfort, Value RPO83 Ford Worldwide News 0 10-08-2002 07:43
EEC4 Fault codes MK XR8 General Tech 32 02-13-2002 21:29

Powered by vBadvanced CMPS v3.2.2

All times are GMT -7. The time now is 06:58.



Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Relevant URLs by vBSEO 3.6.0
Garage Plus vBulletin Plugins by Drive Thru Online, Inc.