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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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      06-30-2018, 02:12 PM   #23
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For me this started with an ďengine malfunction - reduced powerĒ warning. Which went away after I turned the car off and turned it back on. I read the codes later that afternoon and plugged the flap in and Iím clear since then. I did a couple of WOT pulls last night to try and test it out...
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      06-30-2018, 06:50 PM   #24
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For me this started with an “engine malfunction - reduced power” warning. Which went away after I turned the car off and turned it back on. I read the codes later that afternoon and plugged the flap in and I’m clear since then. I did a couple of WOT pulls last night to try and test it out...
One day mine will keep going into limp mode then another day it won't. So i finally changed the sensor was good for 3 day's then back to limp mode every time i drive
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      07-06-2018, 10:48 PM   #25
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Originally Posted by Julian2485 View Post
One day mine will keep going into limp mode then another day it won't. So i finally changed the sensor was good for 3 day's then back to limp mode every time i drive
Any updates on this? I finally put mine back together after installing a new intercooler and after about 5 minutes it threw the knock sensor and boost codes again...
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      07-06-2018, 10:52 PM   #26
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Quote:
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Originally Posted by Julian2485 View Post
One day mine will keep going into limp mode then another day it won't. So i finally changed the sensor was good for 3 day's then back to limp mode every time i drive
Any updates on this? I finally put mine back together after installing a new intercooler and after about 5 minutes it threw the knock sensor and boost codes again...
No idea bro i heard of one or two guys getting a dme update and it helped one but not the other guy though smh
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      07-06-2018, 11:01 PM   #27
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No idea bro i heard of one or two guys getting a dme update and it helped one but not the other guy though smh
Are you still getting codes?
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      07-06-2018, 11:03 PM   #28
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No idea bro i heard of one or two guys getting a dme update and it helped one but not the other guy though smh
Are you still getting codes?
Yes i am and my clutch is slipping real bad. I'm fbo stock turbos with motiv twin disk clutch. Hadnt had clutch for 2 years yet
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      07-12-2018, 09:14 AM   #29
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Just to close this out for now...I cleaned the VANOS and the codes are clear...will update again if they come back...
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      07-12-2018, 11:26 AM   #30
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Just to close this out for now...I cleaned the VANOS and the codes are clear...will update again if they come back...
Yes please keep us posted
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      07-16-2018, 06:23 PM   #31
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Just to close this out for now...I cleaned the VANOS and the codes are clear...will update again if they come back...
What's the status
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      07-16-2018, 07:37 PM   #32
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Still good here...itís going to the dealer tomorrow for a few days to fix the body damage they did during the blower motor recall...
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      07-17-2018, 02:10 AM   #33
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Still good here...it’s going to the dealer tomorrow for a few days to fix the body damage they did during the blower motor recall...
Ill try cleaning my vanos solenoids like you did then
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      07-22-2018, 05:22 PM   #34
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Any update guys? Iím getting the same codes Randomly around 2-3k RPM Engine malfuntion light come on. Scan for codes and got the following.

2AAF
2E69
3100

What I did so far...Cleaned Vanos, replaced plugs, replaced LPFP sensor, All vaccume lines, Walnut blast.
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      07-22-2018, 07:11 PM   #35
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My car has been at the dealer for a week rechecking the blower motor recall and fixing the body damage they caused the last time it was there but as of last week Iíd gone about 500 miles with no codes.

Last edited by Bimmer_Engineer; 07-22-2018 at 09:13 PM.
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      07-22-2018, 08:35 PM   #36
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Any update guys? I’m getting the same codes Randomly around 2-3k RPM Engine malfuntion light come on. Scan for codes and got the following.

2AAF
2E69
3100

What I did so far...Cleaned Vanos, replaced plugs, replaced LPFP sensor, All vaccume lines, Walnut blast.
Still struggling for a fix too change sensor and still getting code and a few other people having this same issue. I wonder if the wiring going to the dme could be messed up
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      07-23-2018, 08:30 AM   #37
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Quote:
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Still good here...itís going to the dealer tomorrow for a few days to fix the body damage they did during the blower motor recall...
There is a fix for blower motor?
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      07-23-2018, 09:00 AM   #38
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Still good here...it’s going to the dealer tomorrow for a few days to fix the body damage they did during the blower motor recall...
There is a fix for blower motor?
Yea a recall for it they change the wire for it
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      08-01-2018, 04:54 PM   #39
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Hello all. Please update when you can. I'm having the same problem. I have found many reference to the problem in various threads but not that contain the definitive fix.
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      08-01-2018, 07:39 PM   #40
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I cleaned my vanos and Iíve been good for almost a month and about 500 miles...
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      08-20-2018, 10:01 AM   #41
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I have the same issue here. Replaced knock sensor and cleared codes. Ran good for a few days then it came back. Dealer found TSB which requires DME update. Performed all updates then a week later, knock sensor code returned. I'm lost at this point.

Codes 2E68 and 3100

Anyone find a solution?
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      08-20-2018, 12:02 PM   #42
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Iím stil good after a vanos cleaning...been about 1.5 months and 1k miles...
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      08-20-2018, 04:30 PM   #43
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I have the same issue here. Replaced knock sensor and cleared codes. Ran good for a few days then it came back. Dealer found TSB which requires DME update. Performed all updates then a week later, knock sensor code returned. I'm lost at this point.

Codes 2E68 and 3100

Anyone find a solution?
Had a friend that changed literally everything and did dme update no luck.
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      09-07-2018, 12:50 PM   #44
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I still get these codes once a month. Then just goes away. Changed sensors about 2yrs ago. Maybe JB4 software related....
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