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Author
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Topic: 2004 Check Engine Light Problem
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brushwolf
Journeyman Posts: 5
From: Rush City
Registered: Apr 2003
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posted 05-22-2006 06:40 PM
 
Hi, Friend of mine bought a really nice 2004 with a V6 that had dual exhaust and dual cats added to it(whoever did it was no hack, and did a real nice job). After driving it a couple weeks the check engine light comes on. Shop said bad 02 sensor and replaced it, resets computer. Couple more weeks, light comes on again. Shop says it is likely exhaust flow volume in 2 pipes not making computer happy and that Ford is no stranger to that problem even w/o exhaust enhancement. Shop ordered an 02 sensor eliminator and installed, resets computer, but after a couple weeks the light is on again. Now shop is talking about re-programming computer. Can't light just be disabled since car has full gauges anyway? How can bulb be removed? Or is there any other way to get rid of annoying light. Car runs great all the time and computer has no other code issues but it keeps thinking 02 sensor has a problem, presumably because of exhaust mod's.. Thoughts? Thanks, Mike
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hwyman3
Gearhead Posts: 2592
From: Southern Maryland, USA
Registered: Jul 2004
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posted 05-22-2006 10:00 PM
I don't know what the emmissions inspections are like where you are, but here, if they pick up one code from the OBD Computer, you fail. For whatever reason, the computer may not like the cats that were installed. My girlfriend recently went through something like that on her Impala that it was constantly giving us O2 Sensor failures, but a garage removed the guts from the cats.------------------
Greg W.
M&M #3962 MCA #52100
2002 Laser Red GT Coupe The Highwayman 3
1991 F-150 XLT 4x2 5.0 Ole Faithful
Southern Maryland Mustang Club
http://mustangsandmore.50megs.com/MembersPics/hwyman3.html
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SUBMARINER MUSTANGER
Gearhead Posts: 1474
From: Grandview, Missouri
Registered: Jun 99
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posted 05-23-2006 07:37 AM
quote:
Originally posted by brushwolf:
Shop says it is likely exhaust flow volume in 2 pipes not making computer happy and that Ford is no stranger to that problem even w/o exhaust enhancement.
Hmm, that's a new one!  One piece of very important information you forgot to include........what is the code? ------------------
Sub Stanger/Oxford White 2003 Mach 1.
MustangsandMore Member #91
MCA Member #61863
Past Mustangs: '84 GT 5-speed; '91 GT auto; '70 M-code Mach 1, grabber yellow; '95 GT-S 5 speed, green, wrecked and totalled; 1995 GT-S 5 speed, bright yellow; '94 6-banger, wifes; '89 LX 5.0 vert, '90 LX 5.0 hatch, '69 M-code Mach 1, 4 speed, 1990 5.0 LX 'vert w/ AOD converted to T-5.
[This message has been edited by SUBMARINER MUSTANGER (edited 05-23-2006).]
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GTRocks
Gearhead Posts: 4800
From: Lusby, MD
Registered: Jun 99
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posted 05-23-2006 05:42 PM
You need to make sure he put in a mil eliminator for each O2 sensor and not just the one that was complaining.
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