quattro Digest, Vol 128, Issue 1

Peter Badore pbadore at aol.com
Mon Jun 2 12:01:42 PDT 2014

Hi Nick,
Even  20 year old  Audi 5000/ 200 turbos had knock sensors, some had two knock sensors.
Just Google knock sensor function and you will see how they work. Knock sensors 
pull back spark timing and some reduce boost. Usually there is a DTC set   I think but its does not
turn on the MIL but could be some exceptions.  




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Subject: quattro Digest, Vol 128, Issue 1

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Today's Topics:

   1. 2009 A4 TSI (Nick Lawrence)


Message: 1
Date: Mon, 02 Jun 2014 14:51:04 -0400
From: Nick Lawrence <nick at beol.net>
To: quattro at audifans.com
Subject: 2009 A4 TSI
Message-ID: <538CC798.5030908 at beol.net>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

I moved up about 2 decades in Audi technology and am getting a 2009 A4 
Avant TSI.   I would like to know If there are knock sensors (most 
likely), and how they function.
Meaning if there is knock does the computer make changes and if it 
continues to knock create a stored code?
Is there ever any driver visible indicator that there is engine knock?
Any insight will be appreciated.
Nick   central Ohio


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