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O2 Sensor - Bank 1 Sensor 2

J

jenebo

New member
I am getting a code for a bad 02 sensor. Is the bank 1 sensor 2 on the rear manifold? Has anyone changed this out? Is it a pain to get to? I cannot remeber the OBDII code off the top of my head.
 


bank one o2 is the one in the rear manifold, bank 2 is post cat.

post the code, if it could be a vac leak, not a o2.

if it is the o2, you need a o2 socket to remove it.
 
Scottydoggs said:
bank one o2 is the one in the rear manifold, bank 2 is post cat.
Click to expand...

ANNNNNNNNNTTTTTT

3800's only have one bank because the exhaust is combined into one pipe before the first sensor.

Bank 1 sensor 1 is in the rear manifold
Bank 1 sensor 2 is after the catalytic converter
 
BillBoost37 said:
Bank 1 sensor 1 is in the rear manifold
Bank 1 sensor 2 is after the catalytic converter
Click to expand...

Well, I think I lucked out then since I was not looking forward to getting to the rear manifold.

When I go to pick up the O2 sensor, I will scan it again and get the code.
 
sensor one is in the rear manifold. its easy to get out with a o2 socket.

get it scanned first again. lets make your of what your working with.

o2 sensors are much cheaper on line, like @ rock auto. so try not to buy one local. shop around get some local prices.
 


Same applies to all grand prixs/wbody....bank 1 sensor one rear manifold. Bank 1 sensor 2 post cat 02 sensor.

The V8 does not have dual upstream 02 sensor
 
Yes these errors are on a GXP. I re-scanned the car today and got P0036, P0054, and P0141. A new code of P0300 just showed up as well but I am guessing it it related the other 3.


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Thanks guys. I will get that o2 sensor in and see if I can reach the rear plugs.


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i used the o2 socket got it from HF for like 8 bucks. then used 2, 6 inch extensions and a short pipe on my ratchet. this got me just over the sc on my 3800. i know your engine is bigger but if you look back there im sure you'll see it. maybe more or less extensions.

i didnt rock the engine forward either.
 
Has anyone got this sensor off before? The tool that I borrowed is too short to extend past the u-pipe. I have a wobble on there right now and still cannot get it to bite. Is there a longer o2 sensor socket out there?
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Was it a stubby 7/8" wrench or full length. I tried to wedge a full size one up there but no luck.


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I got it. Regular length 7/8" angled just like you said. I attempted to pb blast the dp bolts but would not budge. Whew glad that's over with. Again thanks for all the help.


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