rusty1891

does anybody know if there is a way to bypass a 02 sensor on a non cali 22re so the truck still functions like the sensor is there?

snobdds

You would have to run a O2 simulator to make the computer think the correct air/fuel mixture is getting fed into the engine. I believe URD makes one, but have no idea if they do for the 22RE. I know they do for the 3.4. That unit would not be cheap. Plus, I think they only make them for supercharged setups, due to have to run it a little on the lean side.

Why would you not run a O2 sensor, a denso unit is only about 60 bucks from sparkplugs.com?

rusty1891

i already replaced it with a bosch sensor and i"m still getting the check engine light because my cat is hollowed out so the sensor isn't able to pick up the emissions like it is susposed to. i know everybody just says pull the bulb for the check engine light but i like to know when other things aren't working properly.

874runnersr5

you can get spacers that lift the o2 out of stream just a tad and get the correct reading.

peow130

clear codes, then check..
it's probably still throwing the old code.

otherwise, put in an OEM o2, because the bosch units are garbage.

snobdds

Go denso, Bosch are junk on our trucks.

xxxtreme22r

what year is the truck? if it's only got 1 o2 your SOL you need that there for the engine to run properly.

If it's the second one, and your only getting a cat efficiency CEL (which no matter what you do BOSCH DENSO ETC ETC your still gonna get that with a hollowed cat.

I've posted on here before how to "disable" the second o2 which although is odd it actually works. It involves using a spark plug anti fouler between the exhaust and the o2 sensor.

sb5walker

Yeah, using a Bosch will not work and that may be the only problem. Here are a few reports of problems with those sensors:

https://www.yotatech.com/forums/f116...l#post50849557
https://www.yotatech.com/forums/f116.../#post51072210
https://www.yotatech.com/forums/f116.../#post51248025
https://www.yotatech.com/forums/f116...06/#post936034
https://www.yotatech.com/forums/f116...l#post50779151
https://www.yotatech.com/forums/f116.../#post50898016
https://www.yotatech.com/forums/f116...r-woes-164595/
https://www.yotatech.com/forums/f116.../#post50896986
https://www.yotatech.com/forums/f116.../#post50707951
https://www.yotatech.com/forums/f116...-calif-222662/

I think there's a good chance that a Denso direct-fit (Amazon usually cheapest) will work, even with a gutted cat. I remember thinking from reading about the ecu logic on that sensor that it wouldn't detect a bad cat, so having a gutted one may not be a problem.

xxxtreme22r

right but since he's not telling us what code it's throwing he's not gonna get accurate info. I have to assume this is an OBDII 96+ truck. But it's it the wrg section for that and he did say it's a non-cali truck. But dos that mean is a FED and not CALI emmisions or does that mean t ruck isn't in CALI and doesn't "need" cal emissions. I am not sure if th95's and below non-cali or even cali emissions trucks had that second downstream sensor. Or is he talking the upstream one?

People need to put more info on the trucks so the ones tryin to help them out don't have to troll threw their other threads to figure out exactly what they are working on.

BTW O2 sims are only for downstream sensors as well as my spark plug anti-fouler trick. And CANNOT be used on upstream sensors that control A/F ratio. Which are the ones I believe people have the Bosche versus Denso O2 problems. And a gutted cat would have no affect on the upstream sensor.

sb5walker

Oh yeah, I missed that - not a CA truck so the cat is totally irrelevant. Rusty, you're talking about bypassing the O2 sensor??? How's the computer going to set mixture????? That's a computerized fuel injected motor you got there, as in, the computer controls the fuel. And that computer needs a working O2 sensor. Otherwise, it will run the motor in open loop all the time, the warm-up mode that runs the motor too rich, totally gunking the plugs, pistons, valves & heads with lots of excess carbon. It'll run terribly, get terrible gas mileage, and you'll eventually have a real problem with the carbon buildup. Toss that bosch and get a denso direct-fit, if you want it to run right.

874runnersr5

wow i put a bosch in a while ago.. time to order a denso!

rusty1891

thanks for all the tips i was out of town this weekend dirt biking i guess i need to get a denso sensor from what everybody is saying. i dont remember what the code was but it was the one that is wasnt picking up anything over 2000 rpm

Jjlanc