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Knock Sensor 1 vs. 2

Discussion in 'Technical Chat' started by foampile, Dec 15, 2011.

  1. Dec 15, 2011 at 8:24 AM
    #1
    foampile

    foampile [OP] Well-Known Member

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    I need to replace KNOCK SENSOR 2 on my Tacoma V6 4L 2007 Access cab. I am about half the way done taking out the cylinder heads but was wondering, once everything has been removed out of the way, how do I tell which one is 1 and which one is 2. OBDII says I need to replace 2. I know the recommendation is to replace both at the same time because it is PIA to access them so you might as well once you've gone through the effort but I only have to replace 2 to shut the check engine light and pass the inspection and times are difficult moneywise...

    Thanks in advance
     
  2. Dec 15, 2011 at 8:35 AM
    #2
    Toyota Tech31

    Toyota Tech31 Sometimes when I close my eyes, I can't see.

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    Ok, so from my experience, the only thing that sets a light for a knock sensor on toyotas is if a rat has gotten in there and chewed up the wires going to the sensors. Not 100% garunteed, but its is most likely the problem. Such being the case, go to your local dealer and purchase the small knock sensor harness that goes in the valley, should be fairly cheap. And why you are there, if you want, replace both sensors, but i would guess you shouldnt have to replace either one once you get in there and see what has happened.
     
  3. Dec 15, 2011 at 9:02 AM
    #3
    foampile

    foampile [OP] Well-Known Member

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    thanks but that doesn't answer my question, which is: how do i tell which one is 1 and which one is 2?
     
  4. Dec 15, 2011 at 9:14 AM
    #4
    Toyota Tech31

    Toyota Tech31 Sometimes when I close my eyes, I can't see.

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    Well, sorry i didnt answer the question, i was trying to help inform you of my experiences with toyota knock sensors, again, in 6 years with toyota i have seen 1 knock sensor go bad , ever.

    But to answer your question, #1 would be for bank 1 which on our engines is on the passenger side. So, #2 would then be for bank 2 which, is on the drivers side of the engine.

    Hope this helps.
     
  5. Dec 15, 2011 at 9:53 AM
    #5
    foampile

    foampile [OP] Well-Known Member

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    yes, it does. thanks. i have tried multiple OBDII devices and they all say the same thing: knock sensor 2. i'm gonna replace it and see what happens, i.e. whether the light goes off.
     
  6. Dec 15, 2011 at 10:22 AM
    #6
    Toyota Tech31

    Toyota Tech31 Sometimes when I close my eyes, I can't see.

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    I am not saying anything about the quality or accuracy of your scanners, i am mearly trying to help you avoid issues with getting in there and finding the wires all chewed up by a rat. Either way, good luck to you, let me know how it turns out.
     
  7. Dec 15, 2011 at 10:40 AM
    #7
    foampile

    foampile [OP] Well-Known Member

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    will do, sir. thanks
     
  8. Jan 3, 2015 at 12:11 PM
    #8
    Arstacoma

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    What ever happened I'm having the same problem knock sensor 2 I'm getting it fixed on Monday but not sure if that's the exact problem
     
  9. Jan 6, 2015 at 9:41 AM
    #9
    Arstacoma

    Arstacoma Member

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    Well it was proven RATS
     
  10. Jan 7, 2015 at 5:52 PM
    #10
    08TacoTrD

    08TacoTrD Well-Known Member

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    Chipmunks chewed through my harness. Evil little creatures.
     
  11. Jan 13, 2016 at 6:25 PM
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    Zona Scout

    Zona Scout The Local Marina Master Baiter

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    Not trying to bring up bad memories for anyone, but did anyone get this covered under warranty?
     
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