P0155 Sensor change
Thread Starter
Pit Crew
Joined: Jan 2014
Posts: 108
Likes: 4
From: nj
P0155 Sensor change
My car has been giving me a P0155 showing Bank 2 Sensor 1. It's a 2002 GS300.
Is the sensor in the pic correct?
What tools will make this easier to replace? Is their a specific socket that works best on these sensors?
Is the correct part Denso 234-4630?
Thanks for reading.
Is the sensor in the pic correct?
What tools will make this easier to replace? Is their a specific socket that works best on these sensors?
Is the correct part Denso 234-4630?
Thanks for reading.
Driver School Candidate
Joined: Dec 2015
Posts: 35
Likes: 1
From: Czech Republic
yeah, that's it (see attached diagram)
shops sell a special socket to use on these but I'm not sure you'll be able to get it there from top so I'd probably use an open wrench. To make it easier, soak it in WD40 or something couple hours before you remove it to make sure it's not stuck
shops sell a special socket to use on these but I'm not sure you'll be able to get it there from top so I'd probably use an open wrench. To make it easier, soak it in WD40 or something couple hours before you remove it to make sure it's not stuck
Thread Starter
Pit Crew
Joined: Jan 2014
Posts: 108
Likes: 4
From: nj
yeah, that's it (see attached diagram)
shops sell a special socket to use on these but I'm not sure you'll be able to get it there from top so I'd probably use an open wrench. To make it easier, soak it in WD40 or something couple hours before you remove it to make sure it's not stuck
shops sell a special socket to use on these but I'm not sure you'll be able to get it there from top so I'd probably use an open wrench. To make it easier, soak it in WD40 or something couple hours before you remove it to make sure it's not stuck
It looks like it might be more accessible to get a wrench on then I feared it would be. I'm probably going to get this socket: Looks like I can get better wrench placement using this then I would be just using the wrench right on the sensor.
Hopefully all will go well when I go to replace it.
Advanced
Joined: Jan 2009
Posts: 690
Likes: 25
From: South Austin, Texas
Thanks for the reply George.
It looks like it might be more accessible to get a wrench on then I feared it would be. I'm probably going to get this socket: Amazon.com: Powerbuilt 648442 Oxygen Sensor Sockets: Automotive Looks like I can get better wrench placement using this then I would be just using the wrench right on the sensor.
Hopefully all will go well when I go to replace it.
It looks like it might be more accessible to get a wrench on then I feared it would be. I'm probably going to get this socket: Amazon.com: Powerbuilt 648442 Oxygen Sensor Sockets: Automotive Looks like I can get better wrench placement using this then I would be just using the wrench right on the sensor.
Hopefully all will go well when I go to replace it.
Driver
Joined: Sep 2015
Posts: 125
Likes: 1
From: Missouri
I second the above notion. Use a 7/8 open end wrench and lots of PB blaster. Most of those O2 sensor sockets suck and they stretch and strip the sensor housing. The wrench works better. Especially if you rub a little valve lapping compound on the wrench. No slip!!
How to identify which bank to look for. You have to stand and look at the engine with the harmonic balancer facing you. Bank 1 will be on the left side and bank 2 will be on the right side.
Pole Position
Joined: Apr 2007
Posts: 344
Likes: 8
From: ca
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Pole Position
Joined: Apr 2007
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From: ca
Thread Starter
Pit Crew
Joined: Jan 2014
Posts: 108
Likes: 4
From: nj
You both are very right that an open end wrench fits much better then the socket does. Frankly with the lack of clearance I couldn't use the ratchet if I wanted to.
But after about an hour of trying, it didn't budge not a bit. I used PB Blaster before and during my attempts. I'm hoping it will penetrate into the grooves a bit till I try again in a day or so. Should I keep spraying more or will what I've sprayed already start to work?
Driver
Joined: Sep 2015
Posts: 125
Likes: 1
From: Missouri
I would continue to spray it periodically and let it soak in each time. Keep in mind that stuff will burn if it gets hot enough.
Sometimes, taking the sensor out hot makes it easier. Run the car for a while until the engine is good and warm, then attempt removal if you can take the heat.
Sometimes, taking the sensor out hot makes it easier. Run the car for a while until the engine is good and warm, then attempt removal if you can take the heat.
Driver School Candidate
Joined: Dec 2015
Posts: 35
Likes: 1
From: Czech Republic
Well I got around to working on changing the sensor.
You both are very right that an open end wrench fits much better then the socket does. Frankly with the lack of clearance I couldn't use the ratchet if I wanted to.
But after about an hour of trying, it didn't budge not a bit. I used PB Blaster before and during my attempts. I'm hoping it will penetrate into the grooves a bit till I try again in a day or so. Should I keep spraying more or will what I've sprayed already start to work?
You both are very right that an open end wrench fits much better then the socket does. Frankly with the lack of clearance I couldn't use the ratchet if I wanted to.
But after about an hour of trying, it didn't budge not a bit. I used PB Blaster before and during my attempts. I'm hoping it will penetrate into the grooves a bit till I try again in a day or so. Should I keep spraying more or will what I've sprayed already start to work?
Other stuff that works wonders at loosening seized threads is a brake fluid BUT it eats away paint
Thread Starter
Pit Crew
Joined: Jan 2014
Posts: 108
Likes: 4
From: nj
Thanks for all the wonderful suggestions and encouragement. Tried again an hour or so after my drive home from work, got it out and the new one in place. No more P0155 code.
Now to track down the P0430 that is appearing
Now to track down the P0430 that is appearing