94 4runner with downstream o2 sensor question v6
03-15-2013 | 07:40 AM
#1
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From: milford pa
94 4runner with downstream o2 sensor question v6
i have a question concerning the downstream o2 sensor or cat monitor..i know its main reason for being there ,but my question is this. will the computer change the way it runs if i have a code for it? will it run any richer or leaner because of the heater circuit code on that sensor? 
03-15-2013 | 08:53 AM
#2
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Joined: Nov 2002
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From: Oklahoma State
I don't know on that year ECU, but the newer model ECUs with OBDII do have some adjustment of the open loop fuel trims based on the down stream O2 sensor feed back from the closed loop mode.
03-15-2013 | 09:03 AM
#3
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From: milford pa
yea, im familiar with obd 2...i work for toyota..lol...but none of the old guys here seem to know...i was asking cause sometimes someone might have that little bit of info that no one else has the privelage of knowing..lol..
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