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SES!!!!!!!

This is a discussion on SES!!!!!!! within the General Help forums, part of the LSx Technical Help Section category; code po 133 o2 sensor CKT slow bank e sensor 1. why does this keeppulling up? I put my old ...

  1. #1
    Member zeetwentyeight's Avatar
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    SES!!!!!!!

    code po 133 o2 sensor CKT slow bank e sensor 1.
    why does this keeppulling up?
    I put my old rear o2 in it ( just did lts).
    but still keeps pulling the code.
    bank 1 is driver side correct?

  2. #2
    O U 8 1 2 Spaz's Avatar
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    wrong section... i'll move this for ya...

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    O U 8 1 2 Spaz's Avatar
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    sounds like it's time for new cats...

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    Member zeetwentyeight's Avatar
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    No cats and i got the rear o2's tuned out

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    The Bandit Wesman's Avatar
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    Quote Originally Posted by zeetwentyeight View Post
    code po 133 o2 sensor CKT slow bank e sensor 1.
    why does this keeppulling up?
    I put my old rear o2 in it ( just did lts).
    but still keeps pulling the code.
    bank 1 is driver side correct?
    The code is for Bank 1 Sensor 1. That means upstream sensor on the driver's side of the car. Nothing to do with the rear O2's or catalytic converters.

    What typically triggers this code is a worn out O2 sensor. As the sensors get old, they start to switch slower, and the PCM sees this as a degradation in performance and sets a code. What also throws this code is LT headers, which you just installed. Because the O2 is further downstream than it is stock, it takes longer for the O2 sensors to heat up and begin switching. So if you have an older sensor, switching to LTs will only worsen the problem.

    I've replaced multiple O2s in my own car, LT's kill them because they run way too cool being located to far from the engine. The best thing you can do is go to your local auto parts store and buy a Bosch 13111. They have an extra long harness, and better heating elements (supposedly). I've found that they hold up the longest.

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    Member bberretta's Avatar
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    Then it has to be the front o2s. Did you put extensions on them or did you buy the longer Bosch ones?
    2000 Pontiac Firehawk #0041 of 742

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    Member bberretta's Avatar
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    Man Wesman, you beat me by a couple of seconds!

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    Member zeetwentyeight's Avatar
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    I had a bosch on it but I'll by another one and see if it helps

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    Auto Painter RyanJM's Avatar
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    I had bough new Vette Bosch 02's when I dis my headers a couple years ago mine just went bad I brought it back to pep boys and they gave me a new.one.
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    Member 20ws6speed01's Avatar
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    Quote Originally Posted by zeetwentyeight View Post
    No cats and i got the rear o2's tuned out
    what kind of tune..dyno or handheld??

  11. #11
    Member zeetwentyeight's Avatar
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    Quote Originally Posted by 20ws6speed01 View Post
    what kind of tune..dyno or handheld??
    One of my friends did i think its hptuner?

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    Moderator Cutlass's Avatar
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    Maybe you could have your buddy tune out that code as well. Its not a super important one.

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    Member zeetwentyeight's Avatar
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    I think it might be I'm getting like 5 mpgs right now

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    dbl clutch'n like i shld WICKEDLS1's Avatar
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    you DO NOT want to delete it the front o2 sensors are what help control the fuel and air delivery i thought about doing it as well cause mine has thrown that code before but my mechanic said that it helps tell the computer how much air the motor is pushing out wich tell the computer what the fuel and air mixture is. as well as messes with the timing curve

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    Member zeetwentyeight's Avatar
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    No im not going to delete my front sensors nor erase the codes, obviously there is a problem with something that needs to be taken care of, its just a matter of what it is?????

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    dbl clutch'n like i shld WICKEDLS1's Avatar
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    have you hooked it up to an OBD2 code reader

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    dbl clutch'n like i shld WICKEDLS1's Avatar
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    bank one is the driver side did it say up stream ir down stream?

    your best bet is just to replace it and then see if its still comes on

  18. #18
    Member zeetwentyeight's Avatar
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    just replaced it again we will see what happens.
    I did notice that the old one was really black

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    dbl clutch'n like i shld WICKEDLS1's Avatar
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    They get nasty really easily and all the crap that gets on them starts to mess with the way that they read but you cant really do anything about it but which brand did you get and how much?

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    King 0f n00bz shady milkman's Avatar
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    Quote Originally Posted by Cutlass View Post
    Maybe you could have your buddy tune out that code as well. Its not a super important one.
    x2..the more i read...the more i see it not really mattering ..it is my understanding that it is emission test and is calibrated/designed for a stock system.

    Quote Originally Posted by zeetwentyeight View Post
    I think it might be I'm getting like 5 mpgs right now
    that is because once this code is thrown it goes into SD mode

    Quote Originally Posted by WICKEDLS1 View Post
    you DO NOT want to delete it the front o2 sensors are what help control the fuel and air delivery i thought about doing it as well cause mine has thrown that code before but my mechanic said that it helps tell the computer how much air the motor is pushing out wich tell the computer what the fuel and air mixture is. as well as messes with the timing curve
    are you talking about deleting the front o2 or deleting the slow switching code ? deleting the code will only be a issue if the o2 is hanging or just not switching...but most of the time you are fine. deleting the front o2s takes a lot of work but can be done
    Last edited by shady milkman; 09-27-2010 at 02:10 PM.

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