O2 sensor question. (1 Viewer)

[89325iturbo]

Hey, had a check engine light for the upstream O2 sensor. Bought a denso sending. When I went to plug it in, the pigtail of the connector was cut off.
So now I have to do the same, but not sure what color wires is to put the what color wires.
The denso has
2 black
1 white
1 blue.

Stock harness has
1 grey
1 blue which might be shielded
1 yellow w/ red stripe
1 brown w/ black stripe.

 

[ppc]

You need to specify the model year of your vehicle. The following thread should help.

1FZFE O2 Sensor Wiring

Recently bought my first 80 and have been battling this CEL for the O2 sensor, bank 1 upstream. Upon going under the truck I learned somebody installed a universal O2 and got rid of the pig tail connection and just butt connected the wires together. I ended up getting an Denso(OEM) O2, and cant...

forum.ih8mud.com

 

[89325iturbo]

97 fzj

 

[89325iturbo]

Thanks for the link

 

[89325iturbo]

So wired the O2 sensor yesterday. Took it for a drive today, after clearing the the check engine light code.
After about 10 minutes of driving light came back on.
This time check the code and it reads po125.

 

[mtrdud]

A brand new O2sensor with a cut off plug? I just installed two and all is good. I would replace both at one time.

 

[89325iturbo]

No, the O2 sensor had the plug, but my wiring harness o2 sensor pigtail is missing.
Even though it's a different code, then the original O2 sensor code. I imagine it still has to do with the O2.
I was pulling on the harness to gain a little more slack to wire everything together.
Hope something didn't break within the harness (brittle maybe).

 

[Killerpurple]

I replaced mines today. Replace both due to p0130 and p0133. So far no CEL. I have a 97 lx450

 

[Killerpurple]

Oh both denso o2 sensors had the pigtails. I wonder why urs was cut off

 

[89325iturbo]

The denso o2 sensor came with the pigtail.
The pigtail on the 80 was missing, or cut off by the previous owner.

 

[Killerpurple]

oh ok gotcha