Thread: Rear Knock Sensor - should it be plugged in?

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  1. #1 Rear Knock Sensor - should it be plugged in? 
    GTX Level Member Elite6's Avatar
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    Code the nasty P0332 code bank 2 knock sensor low voltage. Had a look at the pig and noticed the wires connected to the KS connect to nothing. Is that correct?

    N-ass-tee spot



    Zip tied to a tranny line, plugs into a plastic piece of nothing. Really hoping this is the problem
    2005 E55 - stock
    1999 GTP 2dr - 9" HAI | Headers | 1.84's | 3.4 | Ported SC|
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  2. #2 Re: Rear Knock Sensor - should it be plugged in? 
    GTP Level Member GTP89's Avatar
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    It has to be plugged in. Look for the wire it is probably hanging somewhere it is only one wire that goes to it. I literally plugged mine in today.
    If You Cant Hear The Whine You're Too Far Behind...
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  3. #3 Re: Rear Knock Sensor - should it be plugged in? 
    Killa Bee Scottydoggs's Avatar
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    rear knock sensor wire is clipped to the bottom back of the p/s pump, look for it in that area.

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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  4. #4 Re: Rear Knock Sensor - should it be plugged in? 
    Turbo is the way to go. BillBoost37's Avatar
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    There will be a single wire (without end from your pic..lol) in the harness that connects to the vss (trans speed sensor) and oil pressure switch. Holler if you need a picture of it, I have a harness or two on the wall I can get one from.
    I drink..so consider that when reading my posts.

    2010 Audi A6 Dual IC's
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  5. #5 Re: Rear Knock Sensor - should it be plugged in? 
    GTX Level Member Elite6's Avatar
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    Holla - pics always help
    2005 E55 - stock
    1999 GTP 2dr - 9" HAI | Headers | 1.84's | 3.4 | Ported SC|
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  6. #6 Re: Rear Knock Sensor - should it be plugged in? 
    GTX Level Member Elite6's Avatar
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    I am hoping this BS is causing the P0332 code - low input voltage for bank 2
    Still doesn't explain my horrendous KR but might explain why timing is still pretty strong with 5-8 degrees of knock (assuming its real) - car still pulls like a cheetah for a stock pulley low tech 3.8
    2005 E55 - stock
    1999 GTP 2dr - 9" HAI | Headers | 1.84's | 3.4 | Ported SC|
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  7. #7 Re: Rear Knock Sensor - should it be plugged in? 
    Turbo is the way to go. BillBoost37's Avatar
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    Well..depending on what the wire it touching..it might.

    Get your butt out there.. and look for the wire. I'm not posting a pic..until you try!
    I drink..so consider that when reading my posts.

    2010 Audi A6 Dual IC's
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  8. #8 Re: Rear Knock Sensor - should it be plugged in? 
    GTX Level Member Elite6's Avatar
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    Suit & tie right now, thinking about diving under there desipte that! lol tonight just before the Leafs game.

    Just to be clear, it goes SENSOR > SINGLE WIRE > PLUG > DIFFERENT PLUG > SINGLE WIRE > HARNESS THAT INTEGRATES WITH VSS & OPS?
    That "DIFFERENT PLUG" should be just behind the PS pump?
    2005 E55 - stock
    1999 GTP 2dr - 9" HAI | Headers | 1.84's | 3.4 | Ported SC|
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  9. #9 Re: Rear Knock Sensor - should it be plugged in? 
    Turbo is the way to go. BillBoost37's Avatar
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    To be clear...it really goes

    Sensor in a location that's a pain to a pigtail extension.
    Extension typically to a connector at the back of the ps pump where it connects to a single wire
    That single wire is in teh loom that comes down from the top of the motor. In it is the wiring for the oil pressure, rear knock (single wire), VSS and rear O2
    I drink..so consider that when reading my posts.

    2010 Audi A6 Dual IC's
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