2004 taco 6cly O2 sensor bank 1 sensor2

I have the p0136 code and discovered by bolts are gone. I wired it for now until I can get it to the garage. Appears threads are worn near the bottom and I could not figure metric or standard. I do not know if the white can take heat. Downstream sensor. Any thoughts out there?

 

get a new gasket !! 2 M8x1.25 nuts and lock washers A few flat washers if needed you will be fine.

Metal lock nuts if you can find them.

Though it does look like a new exhaust is in your future soon!!

 

Thanks Bivy, I tried that but the M8 1.25would not go on to the bolt. I tried 5/16 bolt, no go. Not knowing bolts, could it be the threads are different? What does the 1.25 mean for a bolt?? They only had split lock washers but the nut would no go anyway and I brushed the bolt. So I wired it.

 

1.25 is the thread pitch

I wonder if the nuts were marked wrong.

Every factory and after market piece I worked on had the M8x1.25 studs

 

Would a plumbers clamp work better than my wiring job for now? Thanks. My last question. Appreciate it Bivy.

 

Do you mean a Hose clamp ?

It Can not hurt anything .

Questions are never a problem.

Messages are fine as well. Quoting is also good it can be easy to miss just a post.

 

Bivy. Once you started talked about nut size etc I got back under and got it done. I'm no mechanic. Just needed to crank on the nut to start it, then no problem. Sometimes I break stuff trying to fix stuff. Thanks man. I'm going to put in a new sensor and save $200 plus.

 

Trust me I broke enough for my next life .

The thing is to learn from your mistakes.

Glad you figured it out.

If you replaced the gasket any codes might clear.

 

Bivy: a few questions if you do not mind. I am going to get a gasket tomorrow. I also have a OBD checker and have never used it. I have instructions, but could I damage the electrical system at all if I were to make a mistake using it? I would like to see if the p0136 codes goes away or just get rid of the Check engine light and see if it comes back on. I would like to take a ride without it on for once. I know I also have the P??? for a bad cat and will replace my bank 1 cat when I can afford it. I am doing shocks and struts on Monday for not cheap. Thanks!

 

Replaced my o2 sensors last weekend.

2x M8x1.5 nuts. With a bit of cleaning (PB blaster and fine grit sandpaper), it went in just fine. Keep in mind, I'm from MN and we have harsh winters with A LOT of salt so the threads were rough.

SIDE NOTE: I had bank 1 o2 sensor code. Replaced bank 1 and bank 2, restarted ECU, and still have the code. I did remove my cat (clogged) so that's probably why the engine light is on (replacing later on this fall). Let us know if it goes away! GL!

 

The only way you could hurt anything is if Your OBII device might be defective and be shorted which at most would open circuit protection.

Much more common is a failure to connect !

Always eliminate any other potential problems before replacing a cat.

 

Hey bivy, I bought the O2 sensor, downstream from the 2nd cat and am going to install it. If the bank 1 cat is bad (I small sulphur) won't that trigger the downstream sensor I am replacing? I plan on replacing the bank 1 sensor 2 asap and the bank 1 cat when I can afford it. I also plan on using my obd reader to return off both codes to see what happens.

 

If the Front Cat has really failed the rear O2 sensor monitors the performance of Both Cats the signal always varies a steady signal will most likely trip the PO420 code.

Always eliminate all other possible causes before replaces cats.

What makes you think your Cat or Cats have failed?

 

Historically, the CEL came on and I took to the Toyota dealership, pulled the P0420 code and told me I need new cats for $4200, about a year ago. That was a while ago. Sometime after, I think it was Brakes Plus replaced my emergency brake handle, pulled the codes and the P0136 code came up too - in October.

Recently I discovered the nuts missing from my O2 sensor. I will replace it soon- I bought the part yesterday.

I smell sulphur or like a rotten egg when I drive with my windows open. That is why I think the cat is bad. I was told bank 1 cat is bad?

I know I need a new muffler and pipes.

I am going to replace the o2 sensor (bank1sensor2), clear my codes with the OBD reader I will be using for the first time, erase both codes and see what codes pop up next. I am learning and thanks and appreciate ya. I am enjoying this.

 

If your moving even if your exhaust has massive leaks unless you have very large holes in the floor.

It is almost impossible to smell your exhaust stopped in traffic maybe.

 

Bivy:

I have a question for you. I got my shocks and struts replaced on Monday - Bilstean 4600s - really needed them.

Yesterday I replaced the downstream o2 sensor I was talking about which was easy. When I started the truck up the muffler was started making a loud rattling sound. I know I need a muffler and exhaust. My question is, could changing the o2 sensor have caused the muffler to react like that. It has not made a sound like this before.

This morning the muffler did not make a sound?

Just curious. Just learning.

Thanks!

Mike

 

Bivy:

No need to respond. I think the timing is just a coincidence with my repalcing the sensor yesterday. New muffler next week.

Be good!

 

Just pure chance unless you moved the exhaust to get better access.

 

Barely touched it, but after really looking at the muffler, I am embarrassed and replacing it next week. I did set up for a new exhaust and muffler next Wednesday. I cleared the codes using the OBD reader for the first time ever. Thrilled to not see the MIL - I am sure it is only a matter of time before it comes back on, but I did it and know what to do next time. No need to respond. Sitting at a desk in office waiting to get out of here and drive down to Denver with the new struts/shocks. Have a good weekend.