[Cov292]

Hi all, new to the forum and in need of help replacing bank 1 sensor 2 on my 06 v8 . Po 138 high voltage is active code getting set about every 50 miles. This sensor screws into the catalitic converter through the heat shield covering the converter. I have applied penetrating spray and let sit a few days. Tryed loosen the sensor using slotted socket after warming engine to operating temp. Used medium force with no luck.I know that beneath the heat shield there is a mounting plate the sensor screws into and the plate attaches to the converter. I have been trying to remove the sensor without taking off the plate or heat shield. This is not my only transportaion, so I am in no rush. Giving the penetrant more time to loosen up and not srip or break the sensor. Interested to know any tips or advice

 

[because_v8]

All I can say is be patient and careful. It's a PITA to change o2 sensors sometimes.

Consider changing the front sensor if changing the rear doesn't fix the code. I had to replace all four o2 sensors on my
06 to get that code and a few others go away. Always use Denso brand sensors.

 

[Professional Hand Model]

These two tools helped me. The thread chaser will clean the rust from the threads in the bung. Put some anti-seize on the chaser and run it down the hole. It makes the new o2 sensor go in real nice. The o2 Socket works well with a flexible head wrench if you have it, otherwise a regular will do. You may need a small cheater bar to slip over your wrench handle for more leverage. I use a 1” round by 12” long pipe from the big box.

 

[Professional Hand Model]

Report back with sucess.

 

[cheapskate]

Never had to replace an 02 in any of my vehicles but I know I'm not a big fan of offset sockets from my limited experience using them.
I prefer the inline longer type with the cut out up the side for the wire.

General PDP Template

www.canadiantire.ca

 

[Professional Hand Model]

Never had to replace an 02 in any of my vehicles but I know I'm not a big fan of offset sockets from my limited experience using them.
I prefer the inline longer type with the cut out up the side for the wire.

General PDP Template

www.canadiantire.ca

Not sure that would work on our 1stGens (V8), but maybe on the V6? The V8 has some tight funky angles. I like your idea, though.

 

[cheapskate]

Ah yes, like I said, never had to do one but yes, I can imagine its a tight squeeze in there.

 

[Cov292]

Ah yes, like I said, never had to do one but yes, I can imagine its a tight squeeze in there.

Anyone ever removed the downstream sensor without removing the mounting plate and heat shield?

 

[Professional Hand Model]

Anyone ever removed the downstream sensor without removing the mounting plate and heat shield?

Not sure that is possible. As the nuts (that are usually so rusted) are hard to remove without cutting into them and chiseling off which is what did. Not sure a nut splitter would fit in there between the heat shield. Most people require needing 2 new nuts so plan accordingly. Wire brush everything, inspect the bungs, and reinstall the sensor and the little gasket that comes with it.

 

[Cov292]

I was thinking the sensor screws into the plate. I can get socket onto the senser and why disturb the plate? I have not tried any strong pressure on the sensor yet. Wanting to know if is absolutely necessary to remove the plate and senser together.

 

[Professional Hand Model]

I was thinking the sensor screws into the plate. I can get socket onto the senser and why disturb the plate? I have not tried any strong pressure on the sensor yet. Wanting to know if is absolutely necessary to remove the plate and senser together.

Give it a try your way and let us know how it goes.

 

[BroHon]

I was thinking the sensor screws into the plate. I can get socket onto the senser and why disturb the plate? I have not tried any strong pressure on the sensor yet. Wanting to know if is absolutely necessary to remove the plate and senser together.

Funny thing as I was shopping for my 2 downstream O2s I was wondering the same exact thing.
If I remember correctly last time I was under there the studs just looked like rusty spikes lol.

 

[jodymercier1975]

If the penetrant your using isn't helping i had to use the homemade goodstuff to get mine off. (I did all 4 of my 02 sensors last year as well) I used the ATF mixed with acetone and applied it from a squeeze bottle(plastic soda bottle works) with a small section of fuel line tubing through the cap and I actually inserted a piece of coat hanger into the length of tubing so I could bend it and make it stay where I wanted.👍 and for a week every day after I got home from work and before I started said drive I climbed under there and soaked em. My front ones actually came out easily. The back ones just took a little cheater bar persuasion. The hardest part for me were the clumsy connectors lol. Good luck. And remember....when you feel em give....take your time and for every 1/2 turn loose, go 1/4 turn back so you keep the threads from jamming .

 

[festerw]

The rear sensors won't thread out of the plate.

If your studs are mangled they can be replaced. All 4 of mine unscrewed instead of the nut coming off.

 

[Mr.Bee]

I dug around a little because my rear o2's dont thread into the cat, but when i searched rockauto i found threaded sensors front and rear for the 06.

@because_v8 do your rear sensors mount to studs or screw in?

 

[because_v8]

I dug around a little because my rear o2's dont thread into the cat, but when i searched rockauto i found threaded sensors front and rear for the 06.

@because_v8 do your rear sensors mount to studs or screw in?

On my 06 they screw in. I haven't looked at the 03 but I'm pretty sure they mount to studs.

 

[jodymercier1975]

On my 06 they screw in. I haven't looked at the 03 but I'm pretty sure they mount to studs.

They do indeed. On my 2000 Toyota Tundra 4.7L V8 they are held in by 2 12mm nuts/studs

 

[Professional Hand Model]

Ah. The Ridgeline is different than the Superior Access Cab.

 

[Mr.Bee]

Negs, vvti is different.

 

[skifiddle]

My 02 V8 has front sensors that screw in, Long straight tool worked fine. The rear two have flanges with the studs rotted away. Both sides have two hose clamps holding them in place with no code. I figured that if i changed the cats, they would be stolen a week later. I see replacement flanges with studs that you weld on. Maybe this summer I'll do that. Clamps have been on three months.