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P0332 Code

This is a discussion on P0332 Code within the Technical / Maintenance forums, part of the General Discussion category; Anyone know about PO332 Knock sensor 2 circuit low imput? I read a couple things on the internet, but yall ...

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    Registered User m3gumby's Avatar
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    P0332 Code


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    Anyone know about PO332 Knock sensor 2 circuit low imput? I read a couple things on the internet, but yall are smarter than the internet
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    Re: P0332 Code

    How imperative is it that I change this out?
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    Post Re: P0332 Code

    I have read some places that say the knock sensor is only good for supercharged motors and not for normal motors. But to be 100% honest I donít know how important it is, but I do know you donít want your motor knocking, that will lead to more problems down the road. Try fixing the knock, but if you have the money and the time to do the fix, then do the fix. Do you know anyone with a Tech2 for checking GM vehicles, with that tool you can see if it is really a knock sensor or maybe something else.

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    Re: P0332 Code

    Just the GM Stealership :-0
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    Last edited by m3gumby; 04-07-2008 at 03:52 PM.
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    Re: P0332 Code

    theres a tsb for water intrusion into the rear KS area.

    dont be so impatient. :)
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    Re: P0332 Code

    Is the engine knocking or did the sensor go out? My idle is very steady I recently seafoamed it so it should be okay. Do I have to completely pull off the intake manifold to do this job?
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    Re: P0332 Code

    Quote Originally Posted by m3gumby
    How imperative is it that I change this out?
    depends on how much you like paying at the pump? it is not going to damage your motor, when this sensor goes out it retards the timing, and kills power and mileage ALOT, my 6.0 dropped from 13mpg to 8 pretty quick, on the tank that the sensor went out, just go ahead and set aside an afternoon to change it, its really simple, just make sure you have the sensors, gaskets, in*lb torque wrench, and silicone set aside and ready, tracking down the gaskets took the longest for me, actual changing them out was just a couple hours

    the TSB that BewstAdd1ct mentioned, theres a copy of it in that link i sent you, and trust me they were serious when they said water intrusion caused the damage, there was an inch of water sitting down in the knock sensor hole, and it was rusted all to pieces, only the rear sensor (which is the most common), i had just washed the engine bay a week before i got the code,
    Last edited by GCncsuHD; 04-09-2008 at 08:49 AM.

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    Re: P0332 Code

    I have a feeling its water damage. I went through some big puddles this weekend but my engine compartment was fairly clean. Which gaskets do I need? and was that link to ebay the correct part?
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    Registered User GCncsuHD's Avatar
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    Re: P0332 Code

    Quote Originally Posted by m3gumby
    I have a feeling its water damage. I went through some big puddles this weekend but my engine compartment was fairly clean. Which gaskets do I need? and was that link to ebay the correct part?
    uh that ebay link was for a toyota 4runner?

    and yea if you hit some puddles, that is most likely your problem, it is easy for water to get up in there, but hard for it to get back out, and it will make quick work of those sensors,

    you need the intake manifold gaskets, i used some felpro from autozone, follow that link i sent you, has ALL the info you need, gaskets part number and all
    Last edited by GCncsuHD; 04-09-2008 at 10:19 AM.

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    '99 Sierra 1500 4x4 Z71. 90* Flowmasters, 285 M/T 10" Alpine

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    Re: P0332 Code

    yes thats it, it would be wise to go ahead and get two

    usually its only the rear sensor that goes bad, but every time ive changed them out(worked on plenty of ls1 cars) ive changed both so i wouldnt have to do the other a few thousand miles later

    also FYI you can use those or the sensors off a ls1/ls6 car, the ones i replaced on my truck actually came of a 03 Z06 vette with like 2k mi on it, no real difference in them, they will still work the same
    Last edited by GCncsuHD; 04-09-2008 at 11:12 AM.

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    Re: P0332 Code

    Thanks for the tip, I really appreciate it.

    Is it easier to pull off the whole manifold with everything on it and replace the sensors bench top or just take everything off before the manifold?
    Last edited by m3gumby; 04-09-2008 at 02:01 PM.
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    Re: P0332 Code

    Quote Originally Posted by m3gumby
    Thanks for the tip, I really appreciate it.

    Is it easier to pull off the whole manifold with everything on it and replace the sensors bench top or just take everything off before the manifold?
    you cant replace the sensors on a bench top, the sensors are in the lifter valley cover under the intake manifold,

    but yes you pull the entire manifold, fuel rails, sensors, and all, set it aside, change the sensors, then put everything back together and torque to spec

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    Re: P0332 Code

    didnt see the harness mentioned,if its corroded youll also need a new wiring harness.dealer has them for around 30 bills

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    Re: P0332 Code

    My mom had a 91 Corsica, only on knock sensor. Went bad.
    When it did the car surged really bad, park, drive, moving, sitting still, didn't matter.
    Changed it and it was just fine again.
    Dosen't mean it will act like that though.
    It may also depend on the gas you run, as higer octane will be less likey to knock. (on the same note, most cars/trucks only need 87 octane)


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    Re: P0332 Code

    Quote Originally Posted by p.hinds
    didnt see the harness mentioned,if its corroded youll also need a new wiring harness.dealer has them for around 30 bills
    this is true, but my harness was still in great condition, only my sensor was corroded,

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    Re: P0332 Code

    I just got the P0332 code and it can either be the knock sensor or its low fuel pressure. I thought to myself... Could be a couple things wrong with it.. So I though, low fuel pressure... high milage truck and I have only had it for 6 months.. Fuel Filter... Changed that yesterday, got the code cleared.. getting 21mpg on highway and code hasnt returned...

    Moral of the P0332 code story is, change out your fuel filter first. Its $7 and takes 5 minutes with two tools
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    Re: P0332 Code

    Quote Originally Posted by TexasZ-71
    I just got the P0332 code and it can either be the knock sensor or its low fuel pressure. I thought to myself... Could be a couple things wrong with it.. So I though, low fuel pressure... high milage truck and I have only had it for 6 months.. Fuel Filter... Changed that yesterday, got the code cleared.. getting 21mpg on highway and code hasnt returned...

    Moral of the P0332 code story is, change out your fuel filter first. Its $7 and takes 5 minutes with two tools
    I actually need to change that. I'd rather change that one out first rather than taking apart the manifold. thanks for the advice man!
    '99 Sierra 1500 4x4 Z71. 90* Flowmasters, 285 M/T 10" Alpine

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