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Old 09-16-2003, 12:29 PM   #1
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How many O2 sensors does V6 Mustang have?

My girlfriend's '98 V6 Mustang just had her Check Engine Light come on. She had them run a diagnostic, and they told her it was the REAR TWO O2 sensors, and that this car has 4 sensors. They were charging her $380 for replacing 2 sensors, so I told her to go home, and not to do it. She didn't get the codes from the shop diagnostic.

Does this car really have FOUR O2 sensors? My T-bird with the same engine only has 2, located just behind the exhaust manifolds..............Where are these REAR ones located on the Mustang?

BTW, where can I get these for cheap, and how much should I expect to pay..............is it an easy DIY replacement?

PLEASE HELP!!!!

thx,
JC
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Old 09-16-2003, 12:53 PM   #2
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Your girl friend's Mustang is a second generation on board diagnostics (OBD II) car. It has O2 sensors before and after the cats. Should be an easy DIY replacement, but I don't know how much they cost. I would be very surprised if they were both bad, unless something unusal happened.
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Old 09-16-2003, 03:38 PM   #3
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Quote:
Originally posted by Lots of 5.0 experience
Your girl friend's Mustang is a second generation on board diagnostics (OBD II) car. It has O2 sensors before and after the cats. Should be an easy DIY replacement, but I don't know how much they cost. I would be very surprised if they were both bad, unless something unusal happened.
When you say "BOTH BAD", do you mean both sets (before and after cats, meaning all 4), or the 2 O2 sensors after the cats. I'm assuming there are in fact 4, 2 for each bank.

BTW, how do you reset the computer once the sensors are replaced so that the check engine light goes out??


sorry for the dumb questions.........thx, jc
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Old 09-16-2003, 10:06 PM   #4
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O2 sensors cost around $45-$50 each, depending on brand it may be more. simply disconnect the battery for 15 mins to clear the codes. if you want to do it yourself, there is a special socket you can buy that has a slot on one side, or you can use a wrench if they are not too tight.

ususally when the computer kicks out a code for the O2 sensors it will be 1 code for the left bank and a seperate code for the right bank.
hope that helps you out,
take care
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Old 09-18-2003, 10:02 AM   #5
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I found this on EBAY, and as it's listed, it states it's only for '96 and '97 Mustang 4.6L engine. Now comparing the picture to my Haynes Manual, it looks EXACTLY the same.

http://cgi.ebay.com/ebaymotors/ws/eB...tem=2433003725

Does anyone know if I can use these or not??

thx,
JC
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Old 09-19-2003, 07:57 AM   #6
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They should work, if they are for rear sensors. The front O2 and rear O2 sensors have different plugs.

Most late model Fords use the same type of O2 sensors but different length leads on the harness which is not a big deal as long as they are long enough.
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