96 f-150 codes p0171, p0174, p0420 - Ford Truck Enthusiasts Forums



96 f-150 codes p0171, p0174, p0420

Reply
 
 
 
Thread Tools Search this Thread
  #1  
Old 05-23-2012, 07:32 PM
James Bibb James Bibb is offline
New User
Thread Starter
 
Join Date: May 2012
Posts: 1
James Bibb is starting off with a positive reputation.
96 f-150 codes p0171, p0174, p0420

I recently bought a 96 f-150xl 4.9l inline 6 with about 183k miles. I drove it for a few days and now i have a check engine light with codes p0171, p0174, and p0420. The truck has been driving fine as far as i can tell. No problems with hesitation or engine sounds. I am due for a emissions inspection in a month and need to get this fixed. Any help would be appriciated
Reply With Quote
  #2  
Old 05-23-2012, 07:43 PM
ctubutis's Avatar
ctubutis ctubutis is offline
Moderator
 
Join Date: Nov 2007
Location: Denver Metro Area, CO
Posts: 20,513
ctubutis has a superb reputationctubutis has a superb reputationctubutis has a superb reputationctubutis has a superb reputationctubutis has a superb reputationctubutis has a superb reputationctubutis has a superb reputationctubutis has a superb reputationctubutis has a superb reputationctubutis has a superb reputationctubutis has a superb reputation
Reply With Quote
  #3  
Old 05-23-2012, 08:14 PM
sufferingant's Avatar
sufferingant sufferingant is offline
Senior User
 
Join Date: May 2010
Posts: 188
sufferingant is starting off with a positive reputation.
420 is a catalytic converter deficiency code.

171 and 174 set together usually point to MAF sensor or fuel pump. If it's running okay i wouldn't worry about it, to pass inspections is a different story.

I would recommend pulling the pigtail off your maf and spraying some electrical contact cleaner in the sensor connector and also the pigtail to make sure the connection is good, and then erase your codes with your scanner (or go to your local autozone and get them erased for free).

If that doesn't help, you can buy a can of MAF cleaner for about $10 and try to clean the MAF element itself. If that doesn't work, you could attempt to replace the MAF sensor, usually about $100 and about 5 minutes to replace.

But it could also be a fuel issue or a vacuum leak. When MAF sensors go bad, you tend to get hesitation when accelerating or 'bucking' while driving.

If you find the right people at your local auto parts store, they may be able to let you 'try' a new MAF and return it if it's not the problem.

Good luck, and keep truckin'!
Reply With Quote
  #4  
Old 05-23-2012, 09:07 PM
bruno2's Avatar
bruno2 bruno2 is offline
Postmaster
 
Join Date: Nov 2009
Location: Broken Arrow , OK
Posts: 4,560
bruno2 has a great reputation on FTE.bruno2 has a great reputation on FTE.bruno2 has a great reputation on FTE.bruno2 has a great reputation on FTE.bruno2 has a great reputation on FTE.
Quote:
420 is a catalytic converter deficiency code.

420 Baby!
Reply With Quote
  #5  
Old 05-27-2012, 06:24 AM
ncranchero's Avatar
ncranchero ncranchero is offline
Postmaster
 
Join Date: May 2003
Location: E.Lincoln County, NC
Posts: 3,277
ncranchero has a good reputation on FTE.ncranchero has a good reputation on FTE.ncranchero has a good reputation on FTE.
420 appears to indicate deficiency in more than converters.

Just kidding!
Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
1996 Ford F150 XL 4.9 Liter Error Codes Sailor_963 1987 - 1996 F150 & Larger F-Series Trucks 2 04-09-2016 07:36 PM
Code Help! Whitey Ford 1987 - 1996 F150 & Larger F-Series Trucks 9 03-23-2016 03:59 PM
Ford F150 - Codes P0171 & P0174 raviandsonia 1997 - 2003 F150 4 10-15-2013 10:18 AM
p0420 and p1401 codes amill 1978 - 1996 Big Bronco 9 11-08-2012 03:20 PM
Engine code P0420 kjk 2007 - 2014 Expedition & Navigator 5 08-12-2010 11:37 AM


Go Back   Ford Truck Enthusiasts Forums >

Tags
150, 1996, 96, catalyst, code, deficiency, engine, f150, ford, fords, p0171, p0174, p0420, po171, po174

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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 Off
Pingbacks are Off
Refbacks are Off

Forum Jump


All times are GMT -5. The time now is 04:32 PM.