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

Fooling your 02 sensor

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Old Jan 3, 2008 | 05:41 AM
  #1  
nate V's Avatar
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Fooling your 02 sensor

I thought I might have read it somewhere in this forum but I cant seem to find it. Has anyone out there ever fooled an 02 sensor with a resistor or something similar.
I have successfully done the trick with the EGR valve sensor so I think that it must be doable to the 02's as well.
Just wondering if it can be done thanks ahead for your input.
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Old Jan 3, 2008 | 07:45 AM
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Flash319's Avatar
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From: Barrie, Ontario CANADA
If you run a 2 wire sensor instead of the 4 you can put a resistor on the heater lines and this will get your light out. Other then that you can't because the sensor generates a voltage. You can rig up a pot and give it 0-1volt range.
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Old Jan 3, 2008 | 07:52 AM
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From: Oklahoma State
Yes, if you're talking about a rear O2 sensor.

Here's what I'm using:
http://www.urdusa.com/product_info.p..._id=1230100014

I have a friend that built his own using these instructions for a guide:
http://www.vfaq.com/mods/O2bypass.html

Both are working on trucks with a 3.4 swap.
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Old Jan 3, 2008 | 08:02 AM
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i dont mean to hijack but i wonder if this can be done to the knock sensor as well to get my truck out of limp mode
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Old Jan 3, 2008 | 03:07 PM
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nate V's Avatar
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good info thanks goat
to4menon4u i dont know but i assume that it is doable
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Old Jan 3, 2008 | 03:22 PM
  #6  
Elvota's Avatar
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From: Phx, AZ
Thanks again Mt Goat.

I may try the "build your own" technique as I keep having a code pop up for the rear O2 sensor. I think it's due to my high flow cat or possibly using the wrong sensor (from a '90).

Either way... would be nice to see the light go away.
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Old Jan 3, 2008 | 03:31 PM
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elvis's Avatar
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Originally Posted by to4menon4u
i dont mean to hijack but i wonder if this can be done to the knock sensor as well to get my truck out of limp mode
You and me both; brother... Hikack in progress... See my post on code 12..

(Now returning you to your scheduled posts...)
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