Replacing o2 sensor with wideband

[vdop69]

Alright, need some help from the wideband gurus.

Car is a 2000 5sfe

My bank1 sensor1 sensor on the manifold is broken so I bought a wideband sensor from plx-devices(http://www.plxdevices.com/products/m300/).

I plan on going the ghetto way and splicing at the sensor since I do not have a pinout and looking at that ecu makes my head hurt.

Wiring Instructions: http://www.plxdevices.com/M-Series-C...gram_Small.jpg

I wired up the narrowband output to the white wire at the factory o2 sensor harness. Did I wire this up correct? Thanks

[Eye8Pussies]

^ yup

basically, the grey wire that they mentioned in the diagram then replaces the output of the stock o2 sensor to the ecu

[bronzemaxell]

Originally Posted by vdop69

Alright, need some help from the wideband gurus.

Car is a 2000 5sfe

My bank1 sensor1 sensor on the manifold is broken so I bought a wideband sensor from plx-devices(http://www.plxdevices.com/products/m300/).

I plan on going the ghetto way and splicing at the sensor since I do not have a pinout and looking at that ecu makes my head hurt.

Wiring Instructions: http://www.plxdevices.com/M-Series-C...gram_Small.jpg

I wired up the narrowband output to the white wire at the factory o2 sensor harness. Did I wire this up correct? Thanks

from my experience,
i would rather remove the old one, and read the part number off the bank 1 sensor 1, then call dealer, local or online and get the oem replacement,

i've heard splice wires or aftermarket one works, a few months later, problem returns.

[vdop69]

Originally Posted by Eye8Pussies

^ yup

basically, the grey wire that they mentioned in the diagram then replaces the output of the stock o2 sensor to the ecu

Ok, good to hear. However, I am a little confused as to why I have a cel at the moment and the car does run a little bit lean sometimes(16), I guess I need to stop by Autozone tomorrow to get that code read. In the instructions they mention installing a noise filtering capacitor on the o2 sensor input wire close to the ecu. Is this important?

[Eye8Pussies]

interference is quite possible with the wideband. especially with power sources and power wires - suck as your amp's power cables, etc.

I actually had a bit of a problem with mine when I first installed it...I had the power source for the wideband hooked up to my stereo power, and it wouldn't stop making a whining noise...damn annoying, but it didn't effect the readings though



and the problem that you're having right now is fairly common. although there is a narrowband output for the wideband (after being processed by the sensor computer unit) the output signal does not always match the oem signals emitted by the oem o2 sensor- hence the bad tuning and the CEL.

So long story short, if the problem does not go away or you can't find any way to really solve it, the only solution (which I did from the very beginning since I know how picky the toytoa ecu's are- and specifically my 94 1mzfe ecu is) to replace the stock o2 sensor with an oem o2 sensor for the ecu to tune with, and then weld an extra bung on the y-pipe or down-pipe pre-cat to get the wideband readings.

this is actually the recommended and best way of install a wideband anyway

[vdop69]

yea, never thought about the ecu being so picky with the different signals, but it makes sense. I was running the wideband in its own bung, but since my o2 sensor blew I figured I would take advantage of the output. Guess I'll just bite the bullet and shell out the money to the dealer. Thanks again for all the advice.

[Eye8Pussies]

yeah...sometimes we just can't try and take the easy way out on these things, eh? hey...at least you've already got the bung welded, etc. So it's really just buying a new o2 sensor.

good luck!