HO2 Sensor brand & location???

LannyL81 · 05-27-05, 01:03 PM

Found that the error code I have is pointing to the Bank 2 Sensor 1 O2. Okay, which one is 1, the one closest to the engine or the one after the pre-cat?

Also, which brand to go with? So far have only found Bosch to be available. Is this something that I should stay with GM for?

And I guess you have to drop the exhaust system down to get to these things???

Thanks for all the help.

LannyL81
Tucson, AZ

Vettelt193 · 05-27-05, 02:07 PM

I suggest pulling your spark plugs to check to make sure everything looks ok with them... if you are running rich (or have a mis-fire for some reason), you will just throw money away by putting a new o2 in.

I don't remember which one is which, I *think* the number 1 is before, 2 is after the cats.

I also *think* bosch makes the factory o2's, but don't quote me on that... someone else will chime in to confirm or debunk me

Gorgon · 05-27-05, 02:11 PM

I got my 02 sensor my LT1 through GMpartsdirect.com for $40 with shipping. All in all a pretty cheap fix. Not sure about the sensor number though.

Leon

KOPBET · 05-27-05, 02:27 PM

Bank 1 is driver. Bank 2 is passenger.
Bank n/1 is forward of cat. Bank n/2 is rearward of cat.

LannyL81 · 05-29-05, 08:36 AM

Thanks for the info. My books told me it was the passenger side and I just assumed that #1 was before the pre-cat.

I have sent an email to gmpartsdirect.com for the part number. Have purchased parts from them quite often in the past.

Now, anyone have experience on replacing the O2 sensor? I made one attempt at taking it out.....could not even get a wrench on the sensor. Looks to me tht either I need a short stubby 7/8" open-end wrench OR I get to disconnect the exhaust at the manifolds and lower the entire exhaust system a couple of inches. Tell me there is an easier way...please!!!

(Be sides taking it to a shop and have done)!!

Later,
LannyL81
Tucson, AZ

Gorgon · 05-29-05, 10:01 AM

No experience there. The sensor I changed was on bank 1 and was fairly straight forward.

Bank 1 pertains to the side of cylinder 1 and bank 2 is the side where cylinder is. I made the mistake thinking bank 1 was always the passenger side and installed my new 02 sensor on the wrong side in my Ford F-150. Damn Fords are all backwards.

KOPBET · 05-29-05, 10:29 AM

Quote:

Originally Posted by LannyL81

Looks to me tht either I need a short stubby 7/8" open-end wrench OR I get to disconnect the exhaust at the manifolds and lower the entire exhaust system a couple of inches. Tell me there is an easier way...please!!!

(Be sides taking it to a shop and have done)!!

Later,
LannyL81
Tucson, AZ

Then there's these...

LannyL81 · 05-30-05, 08:16 PM

Nice pictures......the crowfoot looking one would probably work to get the HO2 sensor out, but still need to get my hand in there to pull the connector. Wonder if I can borrow a five-year old somewhere in the neighborhood!!!

LannyL81
Tucson, AZ

LT4BUD · 06-02-05, 09:05 AM

Quote:

Originally Posted by LannyL81

Found that the error code I have is pointing to the Bank 2 Sensor 1 O2. Okay, which one is 1, the one closest to the engine or the one after the pre-cat?LannyL81
Tucson, AZ

What code & when are you getting????

I might have had the same problem & new sensors were not the answer for me.....

I am not where I can get the code but it was something like high output on a front O2 sensor........usually occurs about 2-3 miles down the road, while cruising, after a cold/cool start

LannyL81 · 06-02-05, 04:54 PM

I pulled the code and it was a P152 which is just like you said, high voltage from O2 sensor. The Check Engine light came on after sitting all day and then after 3-4 minutes of engine running; stayed on the entire time. I made one stop for about 20 minutes but the light came right back on upon starting.

I have since cleared the code, but have not started it as I have pulled all the spark plugs out and will be replacing them this weekend.

I do not want to hear that replacing the HO2 sensor is not going to fix this Check Engine light......AAAARRRRGGGGHHHH!

LannyL81

LT4BUD · 06-02-05, 05:50 PM

Quote:

Originally Posted by LannyL81

I pulled the code and it was a P152 which is just like you said, high voltage from O2 sensor. The Check Engine light came on after sitting all day and then after 3-4 minutes of engine running; stayed on the entire time. I made one stop for about 20 minutes but the light came right back on upon starting.

I have since cleared the code, but have not started it as I have pulled all the spark plugs out and will be replacing them this weekend.

I do not want to hear that replacing the HO2 sensor is not going to fix this Check Engine light......AAAARRRRGGGGHHHH!

LannyL81

Yep, that is it..........same deal.......comes on after 5 or so minutes.....will eventually go off after a few starts and/or running time or if you reset.....car runs normal except for the code??????????

Sensors didn't fix mine........maybe someone else has had this code????????

LannyL81 · 06-06-05, 06:54 PM

I installed new plugs and so far the Check Engine lite did not come back on...and least not yet.

Stay tuned.

Later,
LannyL81
Tucson, AZ

LT4BUD · 06-06-05, 10:37 PM

Quote:

Originally Posted by LannyL81

I installed new plugs and so far the Check Engine lite did not come back on...and least not yet.

Stay tuned.

Later,
LannyL81
Tucson, AZ

On mine it was not an everytime occurance, probably no more than 1 in 10, probably less.....so I will be staying tuned.....