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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > 2E68 knock sensor 1 and low boost 3100 codes



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      07-13-2016, 11:11 PM   #1
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2E68 knock sensor 1 and low boost 3100 codes

Keep getting these codes. Need to replace knock sensor ??? Or any other problem?
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      07-16-2016, 10:46 AM   #2
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      07-16-2016, 09:23 PM   #3
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I've got the same issues. But know one seems to know anything. I'm heading to the dealer Tuesday. If they can figure it I'll let you know.
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      07-19-2016, 05:15 PM   #4
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Had dme software update today & everything is good so far. No more knock codes
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      07-19-2016, 10:59 PM   #5
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Quote:
Originally Posted by Hard 90
Had dme software update today & everything is good so far. No more knock codes
I just bought new knock sensor. So far so good.
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      07-21-2016, 12:31 AM   #6
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Quote:
Originally Posted by Chrisred View Post
I just bought new knock sensor. So far so good.
Update only fixed it for a day. Wtf!
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      07-21-2016, 05:34 AM   #7
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Quote:
Originally Posted by Chrisred View Post
Keep getting these codes. Need to replace knock sensor ??? Or any other problem?
The same codes here too. Very annoying
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      07-21-2016, 05:38 AM   #8
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Quote:
Originally Posted by Chrisred View Post
I just bought new knock sensor. So far so good.
Can you provide a link for the knock sensor. Also where exactly is it located.
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      07-22-2016, 09:44 AM   #9
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Quote:
Originally Posted by rob1024
Quote:
Originally Posted by Chrisred View Post
I just bought new knock sensor. So far so good.
Can you provide a link for the knock sensor. Also where exactly is it located.
http://www.pelicanparts.com/BMW/tech...eplacement.htm
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      08-03-2016, 12:06 PM   #10
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Did anyone get a resolution on the knock sensor issue? I am experiencing the same codes right now.
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      08-03-2016, 01:49 PM   #11
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The 3100 is cut boost due to the other code
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      10-11-2017, 12:33 PM   #12
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Has anyone found a fix for this code
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      05-29-2018, 10:23 PM   #13
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Anyone ?
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      06-29-2018, 10:42 AM   #14
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Okay...so I got these codes this morning. Was driving my kids to camp and while stopped at light the dash flashed "Engine Malfunction Detected - Reduced Power"

I shut the car down and when I restarted the warning was gone. I scanned for codes and got these. I've plugged the exhaust flap back in...any insight?
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      06-29-2018, 11:51 AM   #15
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Quote:
Originally Posted by Bimmer_Engineer View Post
Okay...so I got these codes this morning. Was driving my kids to camp and while stopped at light the dash flashed "Engine Malfunction Detected - Reduced Power"

I shut the car down and when I restarted the warning was gone. I scanned for codes and got these. I've plugged the exhaust flap back in...any insight?
I literally just swapped out the knock sensor myself and all is good so far.
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      06-29-2018, 12:11 PM   #16
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How long did that take?

NVM...I read the description the pelican website. It looks like you have to take off the intake manifold. Sounds like a good time to do a walnut blast too...

Last edited by Bimmer_Engineer; 06-29-2018 at 12:57 PM..
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      06-29-2018, 06:51 PM   #17
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Quote:
Originally Posted by Bimmer_Engineer View Post
How long did that take?

NVM...I read the description the pelican website. It looks like you have to take off the intake manifold. Sounds like a good time to do a walnut blast too...
So drove around some more today and knock sensor code came back up smfh.
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      06-29-2018, 06:52 PM   #18
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Quote:
Originally Posted by Bimmer_Engineer View Post
How long did that take?

NVM...I read the description the pelican website. It looks like you have to take off the intake manifold. Sounds like a good time to do a walnut blast too...
Took about maybe 45 minutes had to take off intake intake mani and sensor is sitting right there on the block
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      06-29-2018, 07:31 PM   #19
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Some people on another forum were saying it could be the vanos need to be cleaned...any insight fellas?
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      06-29-2018, 08:36 PM   #20
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Quote:
Originally Posted by Bimmer_Engineer View Post
Some people on another forum were saying it could be the vanos need to be cleaned...any insight fellas?
I'll try that next then.
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      06-29-2018, 09:45 PM   #21
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Fortunately my codes went away for now...I’ll be keen to see what it takes for you to lick this issue...please post your results...
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      06-30-2018, 01:19 PM   #22
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Quote:
Originally Posted by Bimmer_Engineer View Post
Fortunately my codes went away for now...I’ll be keen to see what it takes for you to lick this issue...please post your results...
So once you plugged flap back in your codes went away and haven't come back since ?
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