o2 sensor before CAT

[Paulie6909]

how difficult is this to change myself? i had it checked out by a buddy of mine who works at toyota and thats the sensor that came up...the sulphur is so strong, its not even funny...i can only find a universal one on the net...he told me if i got it done there, it was gonna be around $250 to get it fixed...let me know what you guys think i should do about this

thanks

 

[Mike07SE]

The sensor before the CAT is the Air/Fuel Sensor and plays a vital role in your trucks timing. Unfortunately if there is something wrong with it, it isn't cheap to relace. I had to get a new one when I did my headers and the AFR sensor was crossthreaded in from the factory and so galled up I couldn't reuse it.

The guy at the Toyota parts counter took pity on me and asked why I needed a new one for a truck at the time only a year old. I told him I was putting long tube headers on the truck. He responded that sounds real nice, but that probably cost a little as it is. I said "yes", and he said he was cutting me a break and sold it to me for around $200-250 (can't exactly recall, but was like this).

Unfortunately you're gonna have to bite the bullet on this one.

 

[chaz]

may help http://www.toyota-4runner.org/4th-gen-t4rs/89785-o2-sensor-replace-p0031-code.html http://www.toyota-4runner.org/4th-gen-t4rs/75904-p0031-oxygen-sensor-location.html

 

[Paulie6909]

great!!! this sounds wonderful haha...i haven't started the runner yet today...the last time it came on it went off the next day after i let it sit for the night...but thanks guys i appreciate it

 

[Paulie6909]

well everyone...the check engine light has gone off...could this all be from bad gas?

 

[Paulie6909]

bump!