According to Gadget's postings over at YotaTech when URD first started, it's not easy to tell the old and new sensors apart. For what it's worth, the OBDII Research Center at Colorado State University has a bunch of 'readiness' and procedure charts for recent Toyota engines. If you check...

their Toyota Drive Traces summary
...or...
their Toyota 'Readiness' summary

...you'll see that they list ALL 2001 3.4L V6's in Tacomas as having the 'profile' for the wide range air / fuel sensor (wideband O2). 2001 is the first model year for which they don't mention 2 different versions (wideband vs. non-wideband). This would seem to be a pretty strong clue that you have the wideband sensor.

 

2000 was teh split year for the Tacoma. Some had O2s and some had Air/Fuel Ratio sensors. In 2001 all had the Air/Fuel Ratio sensors.

1999 was the split year for the 4Runner.

Gadget

www.GadgetOnline.com

 

sweet, so I can just get an A/F ratio gauge and do a little bit of tuning? (I still plan on getting your urd unit gadget, just saving a little bit of money) but I want to tun a little bit.

 

A typical air/fuel ratio meter, like the AutoMeter ones will not work on your truck. Those are designed to tap into standard O2 sensors and will not work with the newer air/fuel ratio sensors like the one on your truck.

If you want that meter to work you will need to have a bung welded into your exhaust and install a standard O2 sensor just for your gauge. The sad thing is that after all that work, you are still going to have something that is not accurate enough to do any tuning with.

The way to go is to get a real wide band display unit. If you are going to hard mount it in your truck, then the PLX is the way to go. If you are only going to use it for tuning, then the Innovate LM-1 is the way to go. Now you will have something that really works and tells you exactly where you are and where you need to go.

Gadget

www.GadgetOnline.com

 

I was figuring as much. I was just hoping i could get away with just the wideband o2 on the truck now. it's ok. I'll stick with saving up for the seperate o2 sensor.

it's hard fixing up two cars (even worse for me I got three)