o2 censors

yodaboy4life · Jan 9, 2007

so i have read up on about the o2 cencer and i was wonderin if anyone with as people have called it a 3.slow (3.0) v6 toyota has anyone had a probel with them and needed to change it to help with the fuel and performance it has 208k and as far as i know i have not changed it but we have only had it for 6 or 7 years and we have not changed it over the time should i check it and change it ? thanks for any help every one

MIG'DHORSE · Jan 10, 2007

if it aint broke, dont fix it. but that's only my opinion.

yodaboy4life · Jan 10, 2007

:haha: :haha: thats what my mom always says if i cant find any info on it thats probley what ill do not even worry about it im just going though the list of ideas that could be effectin my gas milage

MIG'DHORSE · Jan 10, 2007

well it could be a problem for gas mileage. so many variables effect gas mileage. dontcha hate it?

notstock · Jan 10, 2007

I changed mine on my 22re after 200k.

yodaboy4life · Jan 10, 2007

MIG'DHORSE said:
well it could be a problem for gas mileage. so many variables effect gas mileage. dontcha hate it?

yea i do it blows

MIG'DHORSE · Jan 10, 2007

i get like... 15 mpg in my truck with a fkd MAF and an old o2.

84Toyota4x4 · Jan 10, 2007

I think youre supposed to change them like every 20K miles or something.

~T.J.

GaryTJ · Jan 10, 2007

Toyota o2's do not fail very often.

You can hook a lab scope to the signal wire at the test box in the engine compartment and look at the pattern to see if it in fact bad.

yodaboy4life · Jan 10, 2007

GaryTJ said:
Toyota o2's do not fail very often.

You can hook a lab scope to the signal wire at the test box in the engine compartment and look at the pattern to see if it in fact bad.

ill try to figer out how to do that i might sound like a dunmb a$$ asking this but is this the same thing as a diagnostics test? is there any way i can find a write up to this procudure??

GaryTJ · Jan 11, 2007

A writeup does no good without a lab scope to look at the pattern.

You can do a basic test to see if it is responding by hooking a voltmeter to the o2 signal, (look in the diagnostic box. I believe the upper left pin) and induce a vacuum leak. The voltage should drop to under .2 volt. then induce fuel, causing a rich condition and the volts should be .8-.9.
If that happens the o2 is working.