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What is a knock sensor?

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  #1  
Old 06-20-2007, 09:52 PM
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Default What is a knock sensor?

Just VAG'd my car and got a fault code of P0328. That's all very well and good, but WTF does:

Knock Sensor 1 Circuit High Bank 1 or Single Sensor
mean?

The check engine light came on today, and I just recently replaced the DV with a new Forge 007. Coincidence?

Thanks mates...

-eric-
 
  #2  
Old 06-20-2007, 09:55 PM
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Default RE: What is a knock sensor?

The knock sensor is supposed to monitor pre-ignition or (detonation)
I don't think the DV would have much to do with that code.
What kind of gas are you using?
 
  #3  
Old 06-20-2007, 10:08 PM
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Default RE: What is a knock sensor?

The wet kind?



Just kidding. I can't remember but I want to say it was Chevron premium.
 
  #4  
Old 06-20-2007, 10:09 PM
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Default RE: What is a knock sensor?

Oh...and thanks for the post. I appreciate that very much!

-eb-
 
  #5  
Old 06-20-2007, 10:15 PM
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Default RE: What is a knock sensor?

Check directly under the intake manifold next to where the thermostat housing is and check to see if the wire for the knock sensor is frayed or broken. If thats ok check your fuel trim with the VAG COM and make sure its around 0% when its running. I think its data block 32. Is the engine stock or are you chipped?
 
  #6  
Old 06-20-2007, 10:39 PM
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Default RE: What is a knock sensor?

Right now I'm more or less stock. I was going to get the Revo stage 1 software this week, but the error code has me concerned. I will check out the wire and see if it looks frayed. Is this a sensor that could go bad? I'm concerned about this as I just did the DV. While its likely un-related it just doesn't sit well with me! My wife also thinks its my fault with all the tinkering I've been doing.

[&:]

=eb=
 
  #7  
Old 06-20-2007, 10:43 PM
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Default RE: What is a knock sensor?

Nah, here's how you tell if the sensor is bad or detecting knock. Rule of thumb is if its detecting knock you will notice a lack of power due to the knock sensor retarding the timing,
or you won't feel any loss of power and the sensor is bad. The knock sensor does go bad every once in a while but its not common.
 
  #8  
Old 06-20-2007, 11:00 PM
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Default RE: What is a knock sensor?

Cool. I'll take the car for a spin tomorrow and see if the power is sluggish. Is this a part I can replace myself if it is indeed bad?

Thanks!

=eb=
 
  #9  
Old 06-20-2007, 11:10 PM
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Default RE: What is a knock sensor?

Yeah if you have a couple of tools. You need a 13mm socket (wobley is easier 1/4) a 12 inch 1/4extension anda 1/4 ratchet. The torque however is very important so if you don't have torque wrench don't do it. It has to be torqued to exactly 20NM or the sensor will give the engine management faulty signals.
 
  #10  
Old 06-21-2007, 08:12 AM
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Default RE: What is a knock sensor?

I was looking for an excuse to buy a torque wrench anyways. Recommendations?

Cheers,

-eric-
 


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