5500 km on a new Q5 TDI and have to replace a knock sensor - Audi Forum - Audi Forums for the A4, S4, TT, A3, A6 and more!


Q5 - Q7 For the Q5 and the new Q7

Reply
 
 
 
LinkBack Thread Tools Search this Thread Rate Thread
Old 02-04-2014, 12:54 PM   #1
Audi Forum - Posts like an A1
Thread Starter
 
Join Date: Dec 2013
Location: Ottawa
Posts: 9
obelisk is on a distinguished road
Default 5500 km on a new Q5 TDI and have to replace a knock sensor

Indicator came on a couple days ago and heard back from Audi that they need to replace the knock sensor. Since the part comes from Germany it will be a couple weeks but they said it is fine to drive with the indicator on.

Normally I would be fine with that except now if there is some other problem I will be oblivious as the indicator is already on.
obelisk is offline   Reply With Quote
Old 02-04-2014, 02:21 PM   #2
Audi Forum - Posts like an S4
 
Tim$2's Avatar
 
Join Date: Nov 2010
Location: Calgary, Alberta
Posts: 207
Tim$2 is on a distinguished road
Default Re: 5500 km on a new Q5 TDI and have to replace a knock sensor

The light will flash/blink instead of being solid if a problem is important enough to not drive the car. Same thing happened to my wifes jetta when it was first new. Took 8 weeks to get the sensor because the car was just out at the time and parts inventory hadn't caught up yet.
Tim$2 is offline   Reply With Quote
Old 02-05-2014, 09:08 AM   #3
Audi Forum - Posts like an A1
Thread Starter
 
Join Date: Dec 2013
Location: Ottawa
Posts: 9
obelisk is on a distinguished road
Default Re: 5500 km on a new Q5 TDI and have to replace a knock sensor

That actually makes me feel a lot better about it. I hadn't realized that it would actually blink under certain conditions.
obelisk is offline   Reply With Quote
Old 02-09-2014, 07:14 AM   #4
Audi Forum - Posts like an A3
 
Join Date: Dec 2013
Location: Quebec City, Quebec, Canada
Posts: 82
Dexter1110 is on a distinguished road
Default Re: 5500 km on a new Q5 TDI and have to replace a knock sensor

Quote:
Originally Posted by obelisk View Post
Indicator came on a couple days ago and heard back from Audi that they need to replace the knock sensor. Since the part comes from Germany it will be a couple weeks but they said it is fine to drive with the indicator on.

Normally I would be fine with that except now if there is some other problem I will be oblivious as the indicator is already on.
Aside from the indicator lighting up, had you noticed anything different with the SUV?
Dexter1110 is offline   Reply With Quote
Old 02-11-2014, 11:25 AM   #5
Audi Forum - Posts like an A1
Thread Starter
 
Join Date: Dec 2013
Location: Ottawa
Posts: 9
obelisk is on a distinguished road
Default Re: 5500 km on a new Q5 TDI and have to replace a knock sensor

No the vehicle is behaving same as usual... they cleared the error when they ran the diagnostic and it has not come back yet. They are going to replace the sensor all the same.
obelisk is offline   Reply With Quote
Old 02-16-2014, 07:09 AM   #6
Audi Forum - Posts like an S4
 
flightmedic's Avatar
 
Join Date: Mar 2010
Location: Airdrie
Posts: 201
flightmedic is on a distinguished road
Default Re: 5500 km on a new Q5 TDI and have to replace a knock sensor

knock or Nox sensor?
flightmedic is offline   Reply With Quote
Old 02-16-2014, 05:22 PM   #7
Audi Forum - Posts like an A1
Thread Starter
 
Join Date: Dec 2013
Location: Ottawa
Posts: 9
obelisk is on a distinguished road
Default Re: 5500 km on a new Q5 TDI and have to replace a knock sensor

Service rep said "knock" which surprised me. Will wait and see when they complete the work what the part actually is. Knock sensors on diesels are not unheard of and you could influence engine knock through control of fuel mixture and injection timing and not just through ignition timing like in a gasoline engine.

Whether Audi is doing this or not on their 2014 diesels or not is another question... will let you know once this work is done.
obelisk is offline   Reply With Quote
Old 02-17-2014, 02:05 AM   #8
Audi Forum - Posts like an A4
 
Join Date: Mar 2010
Location: Sarajevo
Posts: 107
spijun is on a distinguished road
Default Re: 5500 km on a new Q5 TDI and have to replace a knock sensor

Quote:
Originally Posted by obelisk View Post
Service rep said "knock" which surprised me. Will wait and see when they complete the work what the part actually is. Knock sensors on diesels are not unheard of and you could influence engine knock through control of fuel mixture and injection timing and not just through ignition timing like in a gasoline engine.

Whether Audi is doing this or not on their 2014 diesels or not is another question... will let you know once this work is done.
On Audi diesel engines not exist knock sensor, exists only NOX sensor

Attached Thumbnails
5500 km on a new Q5 TDI and have to replace a knock sensor-screenshot170_zps284307bd.jpg  

Last edited by spijun; 02-17-2014 at 02:21 AM.
spijun is offline   Reply With Quote
Old 02-18-2014, 05:07 PM   #9
Audi Forum - Posts like an S4
 
Tim$2's Avatar
 
Join Date: Nov 2010
Location: Calgary, Alberta
Posts: 207
Tim$2 is on a distinguished road
Default Re: 5500 km on a new Q5 TDI and have to replace a knock sensor

Most likely he is saying knock sensor but really means oxygen sensor.
Tim$2 is offline   Reply With Quote
Old 02-19-2014, 03:27 AM   #10
Audi Forum - Posts like an A4
 
Join Date: Mar 2010
Location: Sarajevo
Posts: 107
spijun is on a distinguished road
Default Re: 5500 km on a new Q5 TDI and have to replace a knock sensor

Quote:
Originally Posted by Tim$2 View Post
Most likely he is saying knock sensor but really means oxygen sensor.
LOL "knock sensor but really means oxygen sensor"

Oxygen sensor (or lambda sensor) is not the same as Nitrogen oxide sensor or NOX sensor

Knock sensor works like a microphone listening for detonation (knocking). As the name implies, it senses knocks in the engine.............

Totally different sensors with different functions: Oxygen sensor, NOX sensor, Knock sensor

Last edited by spijun; 02-19-2014 at 04:03 AM.
spijun is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
2004 Audi A4 - $5500.00 airwolph Audi Cars For Sale 0 09-07-2014 09:47 AM
2000 Audi 1.8T Quattro - $5500 maarp Audi Cars For Sale 0 12-29-2010 08:17 AM
Odd "metal knock" noise while in gear and slowing down davis2k 2nd gen. A3 - (Typ 8P/8PA, 2003–present) 2 02-15-2010 12:29 PM
$2,500 to replace the transmisson sensor chip??!! pyramid36 Audi Mailing List 4 03-14-2007 04:37 AM



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -5. The time now is 10:48 PM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.