when should i replace my O2 sensor?
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Freshman User
Joined: Apr 2003
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when should i replace my O2 sensor?
i have a 93 4.0L 2wd that i just turned 170k mi on. it still has the factory O2 sensor. is it time to change it? im getting about 16-20 mpg with driving mixed b/w city and highway. i drive like gramma in my van (my motorcycle is for goin fast) should i be getting better mileage?
any brand of o2 sensor in particular to use, or should i go factory.
thanks
John
any brand of o2 sensor in particular to use, or should i go factory.
thanks
John
Lead Driver
Joined: Sep 2003
Posts: 7,016
Likes: 209
From: SoCal
I would say that as long as the engine is running well, getting good mileage, passing emissions tests, and no "Check Engine" light, keep using it.
As for what brand, I'm not sure, as I've never had to replace any of mine before.
As for what brand, I'm not sure, as I've never had to replace any of mine before.
Post Fiend
Joined: Mar 2003
Posts: 14,413
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From: Sarnia, Ontario, CANADA!
If you notice your mileage going way down for no apparent reason the sensor could be the problem as well. I have also heard when buying a new one to get an OEM part right from Ford. Sometimes the aftermarket ones are generic and don't run properly. FYI.
-Matt
-Matt
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Joined: Oct 2001
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People who sell o2 sensors want you to replace them more often.
I don't replace them unless it is needed.
However, after saying that, I must admit that I once changed the O2 sensor just because I happend to have a new one and the van ran run MUCH better,
I have also had the same results by changing the engine coolant temp sensor.
In both cases the check engine light was not comming on but the van ran a lot better after changing them.
I only buy this kind of stuff from the dealer as the "oem" stuff sold at the local parts house is not as oem as they want you to think it is.
Berry W6EZ
I don't replace them unless it is needed.
However, after saying that, I must admit that I once changed the O2 sensor just because I happend to have a new one and the van ran run MUCH better,
I have also had the same results by changing the engine coolant temp sensor.
In both cases the check engine light was not comming on but the van ran a lot better after changing them.
I only buy this kind of stuff from the dealer as the "oem" stuff sold at the local parts house is not as oem as they want you to think it is.
Berry W6EZ
Postmaster
Joined: Oct 2003
Posts: 4,516
Likes: 1
From: SoCal
In the future I will only mess with the O-2 on my Fords if I get a code. Heres the first thing that I will try to clear the code. Interesting link. www.saabnet.com/tsn/faq/o2sensor.html
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