Check Engine Light 1996 F150 - Ford F150 Forum - Community of Ford Truck Fans



Check Engine Light 1996 F150

Reply
 
 
 
Thread Tools Search this Thread
Old 02-22-2008, 06:55 PM   #1
Junior Member
Thread Starter
 
Join Date: Feb 2008
Posts: 5
Thanks: 0
Thanked 0 Times in 0 Posts
Question Check Engine Light 1996 F150

Hello everyone - new user!

I have a 1996 F150, I6 4.9L, 2wd.

For the past....couple of years....my check engine light has been on and no matter what I do, it has stayed on. It may clear for a few hours, or a day, but always comes back. The code is P0174 or P0171 lean bank 1 or 2. I have replaced the following: All 3 O2 sensors, MAF sensor, Fuel pressure regulator, and the fuel filter.

Does anyone have any suggestions on what else it could be?

Thank you!
Jamie
Smrtass498 is offline   Reply With Quote
Old 02-22-2008, 07:48 PM   #2
ASE Master Tech
 
TRITON7700's Avatar
 
Join Date: Feb 2008
Location: Chaumont NY
Posts: 31
Thanks: 0
Thanked 0 Times in 0 Posts
Default

I Would Try The Idle Air Control Solenoid And/or Engine Coolant Temp Sensor. They Both Contribute To A Lean/rich Condition In The Fuel Regulation Sequence.
TRITON7700 is offline   Reply With Quote
Old 02-26-2008, 08:09 PM   #3
bulit not brought
 
bagged94f150's Avatar
 
Join Date: Feb 2008
Location: tecumseh mi
Posts: 39
Thanks: 0
Thanked 0 Times in 0 Posts
Default

mine says its the egr crap
bagged94f150 is offline   Reply With Quote
Old 02-26-2008, 08:22 PM   #4
Senior Member
 
Join Date: Jan 2008
Posts: 200
Thanks: 0
Thanked 0 Times in 0 Posts
Default

yea its the egr its not even worth fixing it wont effect anything just unplug that light
Ford302V8 is offline   Reply With Quote
Old 02-26-2008, 08:47 PM   #5
No Pain, No Pain!
5 Year Member
 
dewman's Avatar
 
Join Date: Jul 2007
Location: Baltimore, Maryland
Posts: 4,825
Thanked 7 Times in 6 Posts
Default

Quote:
Originally Posted by Ford302V8 View Post
yea its the egr its not even worth fixing it wont effect anything just unplug that light
The light can come on for many different reasons, unrelated to the egr. Unplugging the light keeps you from knowing about future problems.
dewman is offline   Reply With Quote
Old 02-27-2008, 12:15 PM   #6
Junior Member
Thread Starter
 
Join Date: Feb 2008
Posts: 5
Thanks: 0
Thanked 0 Times in 0 Posts
Default Thanks!

Thank you to everyone for the replies. The bad thing about just unplugging the light is that the problem doesn't go away and with the light registering as being on, it won't smog! You used to be able to disconnect the battery so the light would go off for a while to get smogged, but DMV has got hip to that so now they can catch that and you still fail!

I took it to someone and they indicated my O2 sensors are bad. I hope this is it but when the light went on for the first time in 2003, I replaced the top two O2 sensors, and just replaced the lower one. Do they go bad that fast??? I sure hope this is it.....

Thanks again!
Smrtass498 is offline   Reply With Quote
Old 02-27-2008, 04:36 PM   #7
Senior Member
5 Year Member
 
wde3477's Avatar
 
Join Date: Jul 2007
Location: Cape Girardeau MO
Posts: 2,513
Thanks: 0
Thanked 42 Times in 42 Posts
Default

Don't forget to inspect the sensor wiring and connections.

O2 sensors should last for several years, probably on the order of 100,000 miles or better - however, there are exceptions.

Your problem could be an actual condition as opposed to a sensor failure - some casual thoughts are - serious injector fouling, major vacuum leak, blocked EGR flow.
wde3477 is offline   Reply With Quote
Old 04-20-2008, 11:47 AM   #8
Junior Member
 
Join Date: Apr 2008
Posts: 7
Thanks: 0
Thanked 0 Times in 0 Posts
Default

Jamie I have a 1996 f150 inline with the exact problem. Did you ever resolve the "checklight on" problem after all o2 sensors and max air flow valve were changed. I have changed all items except the 3rd o2 sensor. I do not know where it is. I changed the 2 on the exhaust manifold.

Thanks,
mippps
mippps is offline   Reply With Quote
Old 04-20-2008, 01:18 PM   #9
Member
 
Join Date: Feb 2008
Location: Dallas
Posts: 62
Thanks: 0
Thanked 0 Times in 0 Posts
Default

Quote:
Originally Posted by mippps View Post
Jamie I have a 1996 f150 inline with the exact problem. Did you ever resolve the "checklight on" problem after all o2 sensors and max air flow valve were changed. I have changed all items except the 3rd o2 sensor. I do not know where it is. I changed the 2 on the exhaust manifold.

Thanks,
mippps

Jesus christ glad to know I am not Alone!!

I have a 1996 F150 L6 2wd as well, and I have been battling the damn Check Engine Light for the past month.

I replaced all 3 O2 sensors, both pieces on the EVAP purge thing, and clean the Mass Airflow Sensors-god dang light is STILL comming on. I am running our of patience and Ideas. I will try to replace the Mass Airflow sensor next, well see if that does anything

Last edited by jetter2; 04-20-2008 at 01:24 PM.
jetter2 is offline   Reply With Quote
Old 04-20-2008, 01:18 PM   #10
Member
 
Join Date: Feb 2008
Location: Dallas
Posts: 62
Thanks: 0
Thanked 0 Times in 0 Posts
Default

Quote:
Originally Posted by mippps View Post
Jamie I have a 1996 f150 inline with the exact problem. Did you ever resolve the "checklight on" problem after all o2 sensors and max air flow valve were changed. I have changed all items except the 3rd o2 sensor. I do not know where it is. I changed the 2 on the exhaust manifold.

Thanks,
mippps
The 3rd one is under the truck just behind the transmission. Its real easy to get at, youll see it.
jetter2 is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Incredibly bright Led Mirror Puddle Lights Burke484 Lighting 16 10-19-2016 12:46 AM
Rough Idle/Misfiring - HELP! (2006 F150 5.4L v8) carp104 2004 - 2008 Ford F150 39 08-09-2016 07:32 PM
1996 ICM Ignition Control Module "Black" Part #?? ToddS 1987 - 1996 F150 8 12-29-2015 03:37 PM
Electronic modules and "learn" modes River1 1997 - 2003 Ford F150 7 09-04-2015 12:05 AM
New Rear Suspension Tech Westside Offroad Group Ford Raptor Forum 2 09-03-2015 12:42 PM


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



All times are GMT -4. The time now is 06:27 AM.


Copyright 2006 - 2016 F150Forum.com