2E68 knock sensor 1 and low boost 3100 codes

///Motivated · 09-09-2018, 11:35 AM

Check my other thread for my update. The sensors were actually sensing mechanical vibration which caused the plausibility code.

Serhio · 09-15-2018, 01:38 AM

Has anyone found a problem? ((((

The error shows even when driving calmly. It is good to go for a week and everything will be fine, and maybe in a day to show. Sorry for my English

Bimmer_Engineer · 09-15-2018, 06:48 AM

Quote:

Originally Posted by Serhio

Has anyone found a problem? ((((

The error shows even when driving calmly. It is good to go for a week and everything will be fine, and maybe in a day to show. Sorry for my English

Your English is great...much better than my Russian...

Check this thread out and see if it helps...

https://www.e90post.com/forums/showthread.php?t=1520525

Serhio · 09-15-2018, 07:06 AM

Quote:

Originally Posted by Bimmer_Engineer

Your English is great...much better than my Russian...

Check this thread out and see if it helps...

https://www.e90post.com/forums/showthread.php?t=1520525

it's all Google Translate

Thank you

p.s about the wiring already thought. about the roller rocker is something interesting. strangely

Bimmer_Engineer · 09-15-2018, 07:39 AM

Quote:

Originally Posted by Serhio

it's all Google Translate

Thank you

p.s about the wiring already thought. about the roller rocker is something interesting. strangely

I don’t know if you’ve already checked this, but I had the same issue and mine was solved by cleaning vanos...I would only move on to the rocker arms if that doesn’t work...

Good luck!

Serhio · 09-15-2018, 08:10 AM

Quote:

Originally Posted by Bimmer_Engineer

I don’t know if you’ve already checked this, but I had the same issue and mine was solved by cleaning vanos...I would only move on to the rocker arms if that doesn’t work...

Good luck!

I do not understand the dependence of detonation on VANOS. If there is a problem with the VANOS, mistakes will be made on it

VANOS valves cleaned

Bimmer_Engineer · 09-15-2018, 12:34 PM

I don’t know what the dependence of the knock sensors on the vanos is...but I cleaned my vanos over 2 months ago and I haven’t gotten the 2E68 since...

Serhio · 09-16-2018, 03:26 AM

Quote:

Originally Posted by Bimmer_Engineer

I don’t know what the dependence of the knock sensors on the vanos is...but I cleaned my vanos over 2 months ago and I haven’t gotten the 2E68 since...

talk about the gears themselves VANOS?

optigrab · 09-29-2018, 12:23 PM

SUBJECT
N54/N54T - DME Knock Sensor Signal Faults Are Stored
MODEL
All with N54 and N54T engine produced up to 2/28/2011
SITUATION
The Service Engine Soon (MIL) lamp may be illuminated with the following faults stored in the DME.
E60, E61, E71, E82, E88, E89, E90, E91, E92, E93/N54, N54T (DME: MSD80, MSD81):
l 2E68 - Knock sensor signal 1 and/or
l 2E69 - Knock sensor signal 2
F01, F02/N54 (DME MSD87):
l 168001 - Knock sensor signal 1, signal: engine noise above limit value and/or
l 168101 - Knock sensor signal 2, signal: engine noise above limit value
High outside ambient temperatures can influence the frequency of the fault(s) being stored.
CAUSE
DME software error
CORRECTION
Program the vehicle using ISTA/P 2.41.1 or later.

Julian2485 · 07-06-2019, 09:24 PM

Quote:

Originally Posted by optigrab

SUBJECT
N54/N54T - DME Knock Sensor Signal Faults Are Stored
MODEL
All with N54 and N54T engine produced up to 2/28/2011
SITUATION
The Service Engine Soon (MIL) lamp may be illuminated with the following faults stored in the DME.
E60, E61, E71, E82, E88, E89, E90, E91, E92, E93/N54, N54T (DME: MSD80, MSD81):
l 2E68 - Knock sensor signal 1 and/or
l 2E69 - Knock sensor signal 2
F01, F02/N54 (DME MSD87):
l 168001 - Knock sensor signal 1, signal: engine noise above limit value and/or
l 168101 - Knock sensor signal 2, signal: engine noise above limit value
High outside ambient temperatures can influence the frequency of the fault(s) being stored.
CAUSE
DME software error
CORRECTION
Program the vehicle using ISTA/P 2.41.1 or later.

Is this covered under some sort of warranty ?

Bimmer_Engineer · 07-06-2019, 09:45 PM

How often are you getting this code? I still get it every once in a while...last was 2 weeks ago.

Julian2485 · 07-08-2019, 12:02 PM

Quote:

Originally Posted by Bimmer_Engineer

How often are you getting this code? I still get it every once in a while...last was 2 weeks ago.

It comes and goes i last got it last night. I feel like i get it every day to every other day when I'm just cruising. My engine is knocking it sound like a normal n54 engine. The code comes up during the day summer time. I don't get it during the winter

Tyc0 · 09-23-2020, 09:55 PM

anyone ever really get to the bottom of this? dont mean to bring back an older thread but it doesnt seem like anyone ever found a real answer

Aleksandro · 03-13-2021, 10:23 AM

Hi, Guys ! Did someone find the original issue for this error code ?
I've got the same error code 2E68 Knock-sensor signal 1 on my BMW N46B20B Engine.
After this I replaced my knock sensor, but nothing changed. The error continues to show.
After this I noticed a very strange knock sounds from the Engine bay in range between ~ 2K- 3K RPM Video -

* The problem was identified and resolved
Guys if you get a code from knock sensor check the car in service immediately!
The function of this sensor is to "listen" for unusual knock signals from the engine cylinders. If find any error codes related to the knock sensor are registered.
In my case the engine has almost died! 4 from 5 services suggested me to replace the Engine with the same from the same car but on low millage.
Thankfully one service decided to check out and disassembly the engine.
The original problem was the rod bearings. They were almost gone! You can check the video! They measured precisely the crankshaft and for my luck, the crankshaft was not affected/damaged. The reason of this catastrophic failure was fake oil they said . I always used Castrol but here in my fucking country there is a lot of fake stuffs one of them is this oil brand.

Bimmer_Engineer · 03-13-2021, 03:39 PM

Hey...I replaced the sensor and it fixed mine. If that’s not the case then you might have an issue with your rocker arms. There was another owner here who had that issue.

Dobrin · 08-15-2023, 06:35 AM

So, if the 2E68 code persists after replacing the knock sensors, how do I know if it is a mechanical failure with the engine? How do I know if it is rocker arms,, rod bearings, or something else?

danfratamico · 10-02-2023, 12:11 PM

Just out of curiosity, is anyone NOT using premium gas here? I have the same codes and noticed it about the same time I started using 89 in my car instead of 91 or 93. I will try filling up with 93 to see if that fixes the issue for me.

09-09-2018, 11:35 AM	#45
///Motivated Private First Class 49 Rep 101 Posts Drives: 335i, i3 Join Date: Jun 2017 Location: San Antonio, TX iTrader: (0)	Check my other thread for my update. The sensors were actually sensing mechanical vibration which caused the plausibility code.
	Appreciate 0 Quote

09-15-2018, 01:38 AM	#46
Serhio New Member 11 Rep 11 Posts Drives: 135i Join Date: Jul 2017 Location: Russia RnD iTrader: (0)	Has anyone found a problem? (((( The error shows even when driving calmly. It is good to go for a week and everything will be fine, and maybe in a day to show. Sorry for my English Last edited by Serhio; 09-15-2018 at 01:45 AM..
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09-15-2018, 12:34 PM	#51
Bimmer_Engineer Lieutenant Colonel 1044 Rep 1,667 Posts Drives: 2007 335i Join Date: May 2018 Location: Louisiana iTrader: (0) Garage List 2008 Porsche Boxster [0.00] 2016 Mercedes Benz ... [0.00] 2007 BMW 335i [9.50]	I don’t know what the dependence of the knock sensors on the vanos is...but I cleaned my vanos over 2 months ago and I haven’t gotten the 2E68 since...
	Appreciate 0 Quote

09-29-2018, 12:23 PM	#53
optigrab More Boost? 59 Rep 283 Posts Drives: 08 135i MSport 6AT Join Date: Apr 2015 Location: Southern PA iTrader: (2)	SUBJECT N54/N54T - DME Knock Sensor Signal Faults Are Stored MODEL All with N54 and N54T engine produced up to 2/28/2011 SITUATION The Service Engine Soon (MIL) lamp may be illuminated with the following faults stored in the DME. E60, E61, E71, E82, E88, E89, E90, E91, E92, E93/N54, N54T (DME: MSD80, MSD81): l 2E68 - Knock sensor signal 1 and/or l 2E69 - Knock sensor signal 2 F01, F02/N54 (DME MSD87): l 168001 - Knock sensor signal 1, signal: engine noise above limit value and/or l 168101 - Knock sensor signal 2, signal: engine noise above limit value High outside ambient temperatures can influence the frequency of the fault(s) being stored. CAUSE DME software error CORRECTION Program the vehicle using ISTA/P 2.41.1 or later.
	Appreciate 2 Julian2485110.00 a.juarez540.00 Quote

07-06-2019, 09:45 PM	#55
Bimmer_Engineer Lieutenant Colonel 1044 Rep 1,667 Posts Drives: 2007 335i Join Date: May 2018 Location: Louisiana iTrader: (0) Garage List 2008 Porsche Boxster [0.00] 2016 Mercedes Benz ... [0.00] 2007 BMW 335i [9.50]	How often are you getting this code? I still get it every once in a while...last was 2 weeks ago.
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09-23-2020, 09:55 PM	#57
Tyc0 Lieutenant 147 Rep 517 Posts Drives: BMW e92 335i Join Date: Sep 2019 Location: Oregon iTrader: (0)	anyone ever really get to the bottom of this? dont mean to bring back an older thread but it doesnt seem like anyone ever found a real answer
	Appreciate 0 Quote

03-13-2021, 10:23 AM	#58
Aleksandro Registered 0 Rep 1 Posts Drives: BMW 118i Join Date: Jan 2017 Location: Bulgaria iTrader: (0)	Hi, Guys ! Did someone find the original issue for this error code ? I've got the same error code 2E68 Knock-sensor signal 1 on my BMW N46B20B Engine. After this I replaced my knock sensor, but nothing changed. The error continues to show. After this I noticed a very strange knock sounds from the Engine bay in range between ~ 2K- 3K RPM Video - * The problem was identified and resolved Guys if you get a code from knock sensor check the car in service immediately! The function of this sensor is to "listen" for unusual knock signals from the engine cylinders. If find any error codes related to the knock sensor are registered. In my case the engine has almost died! 4 from 5 services suggested me to replace the Engine with the same from the same car but on low millage. Thankfully one service decided to check out and disassembly the engine. The original problem was the rod bearings. They were almost gone! You can check the video! They measured precisely the crankshaft and for my luck, the crankshaft was not affected/damaged. The reason of this catastrophic failure was fake oil they said . I always used Castrol but here in my fucking country there is a lot of fake stuffs one of them is this oil brand. Last edited by Aleksandro; 03-05-2022 at 08:29 AM.. Reason: The problems are founded and resolved
	Appreciate 0 Quote

03-13-2021, 03:39 PM	#59
Bimmer_Engineer Lieutenant Colonel 1044 Rep 1,667 Posts Drives: 2007 335i Join Date: May 2018 Location: Louisiana iTrader: (0) Garage List 2008 Porsche Boxster [0.00] 2016 Mercedes Benz ... [0.00] 2007 BMW 335i [9.50]	Hey...I replaced the sensor and it fixed mine. If that’s not the case then you might have an issue with your rocker arms. There was another owner here who had that issue.
	Appreciate 0 Quote

08-15-2023, 06:35 AM	#60
Dobrin New Member 2 Rep 15 Posts Drives: 2015 455i xDrive convertible Join Date: Jun 2023 Location: CT iTrader: (0)	So, if the 2E68 code persists after replacing the knock sensors, how do I know if it is a mechanical failure with the engine? How do I know if it is rocker arms,, rod bearings, or something else?
	Appreciate 0 Quote

10-02-2023, 12:11 PM	#61
danfratamico Private 17 Rep 92 Posts Drives: 2007 BMW 335xi Join Date: Jun 2015 Location: Elkins Park, PA iTrader: (0) Garage List 2007 BMW 335xi [0.00]	Just out of curiosity, is anyone NOT using premium gas here? I have the same codes and noticed it about the same time I started using 89 in my car instead of 91 or 93. I will try filling up with 93 to see if that fixes the issue for me.
	Appreciate 0 Quote