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  #1  
Old 07-17-2010, 08:51 PM
Saithin Saithin is offline
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Default 2.3 check engine light comes on and off

Sometimes when I drive, my check engine light pops on, everything seems to be running fine, all fluids are good. and after driving a few minutes to will go off. It does it randomly sometimes going slow some times while on the freeway. I tried to go to Auto Zone to get a diag ran on the thing, but the light wont stay on, and if I turn my truck off, the light wont come back on when I start it back up.

Does anyone have any idea what would cause this? Maybe some sensor or something?

Thanks for your help/
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  #2  
Old 07-17-2010, 10:25 PM
ronsonol8 ronsonol8 is offline
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Default Re: 2.3 check engine light comes on and off

tps maybe? try disconecting negitive batt cable for ten min
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  #3  
Old 07-17-2010, 10:39 PM
mickblock mickblock is offline
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Default Re: 2.3 check engine light comes on and off

Probably caused by a misfire, where one cylinder fails to fire momentarily. Do you notice anything like that when it happens?
Could also be a signal error from something like the tps.
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Last edited by mickblock; 07-17-2010 at 10:41 PM.
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  #4  
Old 07-17-2010, 10:59 PM
mikesturbo94 mikesturbo94 is offline
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Default Re: 2.3 check engine light comes on and off

My trucks does the same thing doesn't bother me though I know it's running perfect could be your o2 sensor more than likely Im prety sure that's what mine is
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2008 ford escape xlt 3.0 v6 4x4

94 xlt 5spd longbed,
Was a built 2.3 turbo currently no motor or trans
5.0 swap coming soon
6/5 drop with dream beams,8.8 373 posi,17x9 wheels,swp seats,8k hids, autometer guages, Wideband o2, shiftlight, illusive trans x-member, 01-04 4x4 front bumper
PNW Crew
AC
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  #5  
Old 07-20-2010, 10:21 AM
modelageek modelageek is offline
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Default Re: 2.3 check engine light comes on and off

there should be pending codes even if the light is off.......
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2004 Ext Cab, 4WD, 4.0, Auto, 154k. (4.0 engine is out of a 2009 Ranger w/96k) ( as of 7/1/2017)

2004 Ranger, Ext Cab, 2WD, 3.0, 5 speed , 4WABS, crank windows, no cruise, Edge 116k.(6/5,2014) (SOLD).
1999 Ford Ranger, Reg Cab, 2.5, 5 speed, 2WD, no AC, 150k (SOLD).
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  #6  
Old 07-21-2010, 10:21 AM
lone2ranger lone2ranger is offline
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Default Re: 2.3 check engine light comes on and off

What year is your Ranger? I have a Chilton's manual 1991-1999 and can give you some information if it is one of those years.
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  #7  
Old 07-21-2010, 10:55 AM
rangerhippie rangerhippie is offline
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Default Re: 2.3 check engine light comes on and off

exact same things happens on mine, runs perfect but the light comes on. its just the O2 sensor throwing a code. its nothing really to worry about. you can replace the O2 sensor but i wouldn't really bother unless the light comes on and stays on.
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  #8  
Old 07-21-2010, 11:30 AM
modelageek modelageek is offline
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Default Re: 2.3 check engine light comes on and off

Rangerhippie. I completely disagree with you. As a matter of fact any one that is on these foruns with over 100 posts and does not have a Codereader is doing themselves a disservice. The CEL comes on because something is wrong, it could be a running rich code and that could ruin your cat. You cCan catch a pending code also. My codekey codereader was $20 at Costcos. For the record lean and rich codes do not indicate a bad o2 sensor
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2004 Ext Cab, 4WD, 4.0, Auto, 154k. (4.0 engine is out of a 2009 Ranger w/96k) ( as of 7/1/2017)

2004 Ranger, Ext Cab, 2WD, 3.0, 5 speed , 4WABS, crank windows, no cruise, Edge 116k.(6/5,2014) (SOLD).
1999 Ford Ranger, Reg Cab, 2.5, 5 speed, 2WD, no AC, 150k (SOLD).

Last edited by modelageek; 07-21-2010 at 04:06 PM.
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  #9  
Old 07-21-2010, 11:35 AM
modelageek modelageek is offline
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Default Re: 2.3 check engine light comes on and off

rangerhippie is wrong
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2004 Ext Cab, 4WD, 4.0, Auto, 154k. (4.0 engine is out of a 2009 Ranger w/96k) ( as of 7/1/2017)

2004 Ranger, Ext Cab, 2WD, 3.0, 5 speed , 4WABS, crank windows, no cruise, Edge 116k.(6/5,2014) (SOLD).
1999 Ford Ranger, Reg Cab, 2.5, 5 speed, 2WD, no AC, 150k (SOLD).

Last edited by modelageek; 07-21-2010 at 04:08 PM.
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  #10  
Old 07-21-2010, 03:39 PM
mikesturbo94 mikesturbo94 is offline
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Default Re: 2.3 check engine light comes on and off

Double post^
__________________
2008 ford escape xlt 3.0 v6 4x4

94 xlt 5spd longbed,
Was a built 2.3 turbo currently no motor or trans
5.0 swap coming soon
6/5 drop with dream beams,8.8 373 posi,17x9 wheels,swp seats,8k hids, autometer guages, Wideband o2, shiftlight, illusive trans x-member, 01-04 4x4 front bumper
PNW Crew
AC
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  #11  
Old 07-21-2010, 04:08 PM
modelageek modelageek is offline
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Default Re: 2.3 check engine light comes on and off

Quote:
Originally Posted by mikesturbo94 View Post
Double post^
Brain surgeon ^
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2004 Ext Cab, 4WD, 4.0, Auto, 154k. (4.0 engine is out of a 2009 Ranger w/96k) ( as of 7/1/2017)

2004 Ranger, Ext Cab, 2WD, 3.0, 5 speed , 4WABS, crank windows, no cruise, Edge 116k.(6/5,2014) (SOLD).
1999 Ford Ranger, Reg Cab, 2.5, 5 speed, 2WD, no AC, 150k (SOLD).
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