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Engine & DrivetrainDiscussions about the engine and drivetrain of your vehicle.
This is a discussion thread titled "Code P0155", within the Engine & Drivetrain forum, part of the Technical & Vehicle Assistance Forums category.
Looks like O2 Sensor is bad. It is oxygen sensor 1 in bank 2. I have a couple of questions. I was reading some posts and one thread stated Toyota will replace the 02 sensor if you are within 7 year or 90K miles. It looked like this was only true for the Tundra. Does anyone know if it holds true for the Sequoia or just the Tundra? I have an 02 with 60K miles so I maybe be out of the 7 year part so I will have to check.
If it is not covered someone mentioned taking it out and spraying it with brake cleaner and that MAY solve the problem. How true is this?
Last question is does anyone have a diagram that shows where this o2 sensor is located? If I could get a visual pic I could find it real easy and see how hard it is to get to. It is oxygen sensor 1 in bank 2.
from the way i read this, it's specific when it says 7 years or 90K miles from in service date so if you are past either they do not have to fix it? It also said 2UZ-FE Motor for the Tundra not the Sequoia? These have even been going bad on later model Tundras also, if your motor was a 2UZ-FE i would question it! NO would be expensive but see what they will do!
from the way i read this, it's specific when it says 7 years or 90K miles from in service date so if you are past either they do not have to fix it? It also said 2UZ-FE Motor for the Tundra not the Sequoia? These have even been going bad on later model Tundras also, if your motor was a 2UZ-FE i would question it! NO would be expensive but see what they will do!
I have searched and it sounds like the gad sensor I have is on the passenger side up near the engine. Can someone provide a pic or a link I can go to that shows a pic of it? I just want to make sure I take out the correct one. I have searched and can not find a pic.
ok I finally had a chance to get under the truck which is the only way to see it. I am assuming I found the correct one. when I am laying under the truck it looks to be right in line with the passenger front tire. Did I locate the correct one? If I did how the hell do you get that off? There is no way you can get an open end wrench on it and socket will not be deep enough. Looks like the only way is with a cresent wrench. But my question is how can you get enough on the wrench to break it loose?
I assume the plug part just disconnects. I was not able to try it because it was hot. Do you have to lift a tab or something to make it un snap?
Just replaced that one on my sister's Sequoia. Go to AutoZone. They have a tool loaner policy. Ask for an oxygen sensor tool. It is basically a deep socket with a slot cut in it for the wire to pass through.
The sensor threads get carboned up over time. Liberally soak it with PBBlaster or WD-40 or the like. It was not hard to break loose. However, once you break it free, it will likely only move like a quarter turn. I had to work it back and forth (tighten and untighten), liberally spraying the threads as it bottomed out on the untighten stroke. Don't try to wrestle it too hard cause you can strip or break something. I suggest safety goggles too as your head is face up right under where you are working.
I could not get my hands on the plug, but stuck a small screwdriver under the outside part to lift a tab and pulled on the wires to get it loose. Take a look at the new sensor to see what the plug looks like.
This is perfect ty. I will have to find out if they will let me use the tool even if I do not buy the 02 sensor
Quote:
Originally Posted by Tones
Just replaced that one on my sister's Sequoia. Go to AutoZone. They have a tool loaner policy. Ask for an oxygen sensor tool. It is basically a deep socket with a slot cut in it for the wire to pass through.
The sensor threads get carboned up over time. Liberally soak it with PBBlaster or WD-40 or the like. It was not hard to break loose. However, once you break it free, it will likely only move like a quarter turn. I had to work it back and forth (tighten and untighten), liberally spraying the threads as it bottomed out on the untighten stroke. Don't try to wrestle it too hard cause you can strip or break something. I suggest safety goggles too as your head is face up right under where you are working.
I could not get my hands on the plug, but stuck a small screwdriver under the outside part to lift a tab and pulled on the wires to get it loose. Take a look at the new sensor to see what the plug looks like.
I am just wondering if I should get it form Toyota dealer or the Bosh from Autozone.
Thanks
Quote:
Originally Posted by Tones
Just replaced that one on my sister's Sequoia. Go to AutoZone. They have a tool loaner policy. Ask for an oxygen sensor tool. It is basically a deep socket with a slot cut in it for the wire to pass through.
The sensor threads get carboned up over time. Liberally soak it with PBBlaster or WD-40 or the like. It was not hard to break loose. However, once you break it free, it will likely only move like a quarter turn. I had to work it back and forth (tighten and untighten), liberally spraying the threads as it bottomed out on the untighten stroke. Don't try to wrestle it too hard cause you can strip or break something. I suggest safety goggles too as your head is face up right under where you are working.
I could not get my hands on the plug, but stuck a small screwdriver under the outside part to lift a tab and pulled on the wires to get it loose. Take a look at the new sensor to see what the plug looks like.
I originally bought the Denso at Rock Auto. They had an excellent price on it (<$70). It did not get here in time to meet my sister's schedule, so I ended up getting the Bosch at AutoZone ($99) and sent the other back when it arrived. If you can wait for it, the Denso is the way I would go. Save money and it should be close to OEM.
I wouldn't think AutoZone would discriminate on their tool loaner policy.
Anyone have a pic or a diagram they can point me to look at. I just want to make sure I am replacing the correct 02 sensor. The one I think it is right in line with the front passenger tire. You have to lay under the truck to get to it. Just hate to take the time to do this and replace the wrong one.
It is sensor 1 in bank 2
Thanks
Quote:
Originally Posted by bud4ya
Looks like O2 Sensor is bad. It is oxygen sensor 1 in bank 2. I have a couple of questions. I was reading some posts and one thread stated Toyota will replace the 02 sensor if you are within 7 year or 90K miles. It looked like this was only true for the Tundra. Does anyone know if it holds true for the Sequoia or just the Tundra? I have an 02 with 60K miles so I maybe be out of the 7 year part so I will have to check.
If it is not covered someone mentioned taking it out and spraying it with brake cleaner and that MAY solve the problem. How true is this?
Last question is does anyone have a diagram that shows where this o2 sensor is located? If I could get a visual pic I could find it real easy and see how hard it is to get to. It is oxygen sensor 1 in bank 2.
So i take it you did not call Corporate and ask about the Sequoia O2 sensors being covered under the extended period? the only picture i have would be of a Tundra and it is possible that the Sequoia would be the same but i am not posotive so here is the one i have!
I did call and it is not covered. Thanks for the pic. Hard to tell where it is located from the pic. The only way I could see the sensor I think it is was by laying on the ground under the truck. It was located right in line with the passenger front tire before the Cat. It was the one more towards the bottom not the top of the engine
Quote:
Originally Posted by HOGWILD
So i take it you did not call Corporate and ask about the Sequoia O2 sensors being covered under the extended period? the only picture i have would be of a Tundra and it is possible that the Sequoia would be the same but i am not posotive so here is the one i have!
Thanks I will take a pic and see if anyone can give me the thumbs up on it. Like I mentioned I had to get under the truck to see it. It was right in line with the passenger front tire on the bottom of the engine
Quote:
Originally Posted by HOGWILD
from the way i look at the picture it is on passengers side and located prior to the TWC closer to the exhaust manifold! first sensor on rt side!
Code P0155
Linear Mode
