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86-95 Trucks & 4Runners 2nd/3rd gen pickups, and 1st/2nd gen 4Runners with IFS

o2 senser

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Old Jan 21, 2007 | 07:11 AM
  #1  
86 yota's Avatar
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From: Georgia
o2 senser

How do you know if its bad what are the symptoms. What is it and what does it work. do please explain because i havn't been getting as good of fuel millage around town. Thanks Clint
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Old Jan 21, 2007 | 08:17 AM
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LS1Steve's Avatar
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From: Encinitas, CA
typically if it goes bad it will send a trouble code and you will have a check engine light. I think you can test it with an ohm meter to see if its within spec, not sure what the reading should be, try searching i'm sure its all over
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Old Jan 21, 2007 | 08:44 AM
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tc
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From: Longmont, CO
Originally Posted by LS1Steve
typically if it goes bad it will send a trouble code and you will have a check engine light.
Not necessarily - only when it gets REALLY bad.

Yes, you can check it:
http://personal.utulsa.edu/~nathan-b...01heatedox.pdf

I'd just change it though - about $85 IIRC
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Old Jan 21, 2007 | 08:52 AM
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From: Dover, DE
My rear o2 Sensor (one behind the cat) went and I got a CEL, but before the light i noticed that she wouldn't accelerate as well as she normally did and yeah, gas mileage dropped to like 10-12 miles in the city and 15-16 mile on the highway...

just my .02
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