AR15xAR10s N180 Winter Beater/Party Truck 2000 Highlander 5spd

Well I’m in a 4WD truck and it’s working great hahaha. I looked it up earlier too. Hmmmm give me a few minute

 

The one i found is $45

@Unchained 5150

I’ll order it and a new thermostat since the temp sensor in it could also be bad.

As for right now, i’m just going to get new nuts, stick the old sensor back in and seal the hole so i can at least drive it. I’d like to haul my dog to the groomers in this tomorrow

 

That says excludes California so it’s for the federal emission exhaust. It also says downstream.

I think you’re looking for upstream (was the one hanging down in the picture above both cats?)

 

Yes, i have no idea what i’m doing lol

 

Hahaha it’s a pain in the ass. Just went through it so I’m trying to help if I can!

Direct from DENSO:

 

The DENSO site shows

$147 234-9002 Air Fuel Ratio Sensor

234-9002 (the part number I went with) is the air/fuel sensor for my 1999 4WD Cali Emission 4Runner that works.

What year and model is yours?

 

Also to completely backtrack. Have you tried just putting the sensor back in place, clearing the codes and then driving around? If that sensor is not in place while you drive it will throw those codes. It in fact may be fine/working and just throwing codes because it’s not attached.

 

Codes don't necessarily tell you the correct part that's bad. Many codes put you towards a part of engine/fuel/air/exhaust system, then diagnosis is required to figure out what is actually the failed part. One of the most commonly incorrectly diagnosed code is PO420 which points towards a bad cat, but is often something else tripping the code, and often a much cheaper fix.

Matt

 

Yeah good call. I meant more that you would replace once, have the code persist and then just think to replace the exact same part again haha. I would probably look elsewhere like you suggest if I replaced a sensor and had a code persist; in this case the harness, ECU, etc.

 

I need 2349003

2000 calf 3.4 5spd manual 4x4

 

Yes. Previous owner stated its on its 3rd sensor and has eaten 2 over the last 100k miles

 

Its getting horrible mileage and its passing power is down so i think the cats could be replaced.

But i’m going to replace the sensor and see what happens. Its $115

I cleared the code and it came back on within two miles. Drove it another 30-40 miles and it burnt over 1/3rd a tank.

 

Also did another thing....

 

Exact same symptoms I had before replacing the sensor. Awful gas mileage and rough idle. When the sensor is bad, it can’t read the air/fuel ratio and just dumps fuel to compensate.

Replaced the sensor, wiped the codes and have had no problems since (knock on wood).

 

What do I need to buy next Mason

 

You don’t need to buy anything for me, you can buy yourself something nice...

 

This is what my next order is, i’ll have to wait a week or two before I do that though...

 

I do all the time