Running Issues With DTC?

UltraV · 12-04-2016, 08:22 AM

Hi

So as of last week my car (BMW 320d e90) has started to play up, when the car has warmed up the traction control light will start to flash when:

•Maintaining a constant speed (especially worse when on the motorway)
•Turning left
•Turn on Cruise Control (This makes the situation worse)

When the light flashes the car temporarily loses power, almost like a misfire then car jolts back in to power. This is an intermittent fault that doesn't always happen. I have attached a link to a video of what happens, please note that my passenger was recording the video and not me! Link to video: https://www.youtube.com/watch?v=4mWFGor3cSA

From what I have read up on previous searches it is a problem with the DTC and it thinks the car is "unstable" so it kicks in and stops the car, however nothing was ever concluded on the info i found.

Also I want to note that it was suggested to help with the problem I should turn the DTC off, I have done this and yes it helps a bit and the light does not flash as much but this is not safe and does not fix the root of the problem.

If any of you guys could help out that would be great, I have a long distance journey coming up and I want the car fixed prior.

Ash

dmatre · 12-04-2016, 08:37 AM

Quote:

Originally Posted by UltraV

Hi

So as of last week my car (BMW 320d e90) has started to play up, when the car has warmed up the traction control light will start to flash when:

•Maintaining a constant speed (especially worse when on the motorway)
•Turning left
•Turn on Cruise Control (This makes the situation worse)

When the light flashes the car temporarily loses power, almost like a misfire then car jolts back in to power. This is an intermittent fault that doesn't always happen. I have attached a link to a video of what happens, please note that my passenger was recording the video and not me! Link to video: https://www.youtube.com/watch?v=4mWFGor3cSA

From what I have read up on previous searches it is a problem with the DTC and it thinks the car is "unstable" so it kicks in and stops the car, however nothing was ever concluded on the info i found.

Also I want to note that it was suggested to help with the problem I should turn the DTC off, I have done this and yes it helps a bit and the light does not flash as much but this is not safe and does not fix the root of the problem.

If any of you guys could help out that would be great, I have a long distance journey coming up and I want the car fixed prior.

Ash

Have you recently swapped tires?

I know of one case where the rear tires were replaced, then the problems started. Same description that you provided. BMW had the car several weeks before dealer swapped wheels/tires from another car and the problem went away.

Hopefully it's something simple like this. Good luck.

UltraV · 12-04-2016, 08:45 AM

I swapped the tyres around 4 months ago and the car has been fine until now? I will also add that my Flywheel is on its way out and I am also due to have this replaced, I don't know if that could cause any issues.

UltraV · 12-08-2016, 09:24 AM

I have been told that there are sensors in the wheel area that could be damaged? I am surprised that no one else has really had this issue?

UltraV · 12-09-2016, 05:06 AM

Okay, so from what I can figure out, the sensors are part of a DSC (Dynamic Stability Control) system : http://www.bmw.com/com/en/insights/t...y_control.html

They are also referenced here as part no. 10 : http://www.realoem.com/bmw/enUS/show...diagId=31_0742

So I have taken some photos this morning and I think something is missing ?

Right Front Wheels:

Left Front Wheels:

As you can see the right only has 1 cable and the left has 2, perhaps this is my issue? Is this the missing sensor? If it is I am baffled to how it would have been disconnected?

Willsbma · 12-09-2016, 06:29 PM

Wheel speed sensor?

UltraV · 12-10-2016, 11:28 AM

The car is literally doing this all the time now, I cant make any journey without an intermittent problems, it just keeps cutting the engine like a poor coil pack and then the traction control light flashes, this is even in a straight line!

maxoutput · 12-10-2016, 11:47 AM

Get he codes read and change the wheel sensor that is giving errors, if you are unlucky the reluctor rings may also need changing. If the end of the sensor looks to have been rubbing against something this will be a corroded reluctor ring.

geek · 12-10-2016, 12:03 PM

Is your car xdrive? When this happened to me, it turned out to be the transfer case motor actuator. If this is your problem, it's very common. An actuator gear gets stripped, causing jerky power to be applied to the front wheels. When the gear strips completely, the DTC light, ABS, and 4x4 lights come on and stay on. If you don't have xdrive, this can't be it.

Regarding turning DTC off being "unsafe", I wouldn't worry about it. This feature didn't exist in any cars until the 1990s, and somehow we were all able to survive. However, you're right that it doesn't address the root cause.

UltraV · 12-11-2016, 05:22 AM

I have an OBD2 reader and software , do you think it will throw up error codes even without engine management light on?

It is not an XDrive its 2007 E90 320D M-Sport, it is just so strange that it is even causing problems with turning the DTC off :|

12-04-2016, 08:22 AM	#1
UltraV New Member 2 Rep 20 Posts Drives: 2007 e90 Join Date: May 2016 Location: London iTrader: (0)	Running Issues With DTC? Hi So as of last week my car (BMW 320d e90) has started to play up, when the car has warmed up the traction control light will start to flash when: •Maintaining a constant speed (especially worse when on the motorway) •Turning left •Turn on Cruise Control (This makes the situation worse) When the light flashes the car temporarily loses power, almost like a misfire then car jolts back in to power. This is an intermittent fault that doesn't always happen. I have attached a link to a video of what happens, please note that my passenger was recording the video and not me! Link to video: https://www.youtube.com/watch?v=4mWFGor3cSA From what I have read up on previous searches it is a problem with the DTC and it thinks the car is "unstable" so it kicks in and stops the car, however nothing was ever concluded on the info i found. Also I want to note that it was suggested to help with the problem I should turn the DTC off, I have done this and yes it helps a bit and the light does not flash as much but this is not safe and does not fix the root of the problem. If any of you guys could help out that would be great, I have a long distance journey coming up and I want the car fixed prior. Ash
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12-04-2016, 08:45 AM	#3
UltraV New Member 2 Rep 20 Posts Drives: 2007 e90 Join Date: May 2016 Location: London iTrader: (0)	I swapped the tyres around 4 months ago and the car has been fine until now? I will also add that my Flywheel is on its way out and I am also due to have this replaced, I don't know if that could cause any issues.
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12-08-2016, 09:24 AM	#4
UltraV New Member 2 Rep 20 Posts Drives: 2007 e90 Join Date: May 2016 Location: London iTrader: (0)	I have been told that there are sensors in the wheel area that could be damaged? I am surprised that no one else has really had this issue?
	Appreciate 0 Quote

12-09-2016, 05:06 AM	#5
UltraV New Member 2 Rep 20 Posts Drives: 2007 e90 Join Date: May 2016 Location: London iTrader: (0)	Okay, so from what I can figure out, the sensors are part of a DSC (Dynamic Stability Control) system : http://www.bmw.com/com/en/insights/t...y_control.html They are also referenced here as part no. 10 : http://www.realoem.com/bmw/enUS/show...diagId=31_0742 So I have taken some photos this morning and I think something is missing ? Right Front Wheels: Left Front Wheels: As you can see the right only has 1 cable and the left has 2, perhaps this is my issue? Is this the missing sensor? If it is I am baffled to how it would have been disconnected?
	Appreciate 0 Quote

12-09-2016, 06:29 PM	#6
Willsbma First Lieutenant 77 Rep 330 Posts Drives: 07 328xi Join Date: Nov 2015 Location: 11703 iTrader: (0)	Wheel speed sensor?
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12-10-2016, 11:28 AM	#7
UltraV New Member 2 Rep 20 Posts Drives: 2007 e90 Join Date: May 2016 Location: London iTrader: (0)	The car is literally doing this all the time now, I cant make any journey without an intermittent problems, it just keeps cutting the engine like a poor coil pack and then the traction control light flashes, this is even in a straight line!
	Appreciate 0 Quote

12-10-2016, 11:47 AM	#8
maxoutput Private First Class 33 Rep 182 Posts Drives: E90 2005 Join Date: Sep 2016 Location: U.K. iTrader: (0)	Get he codes read and change the wheel sensor that is giving errors, if you are unlucky the reluctor rings may also need changing. If the end of the sensor looks to have been rubbing against something this will be a corroded reluctor ring.
	Appreciate 0 Quote

12-10-2016, 12:03 PM	#9
geek Enlisted Member 57 Rep 45 Posts Drives: 2008 BMW 328xi Join Date: Sep 2013 Location: Vail, CO iTrader: (0)	Is your car xdrive? When this happened to me, it turned out to be the transfer case motor actuator. If this is your problem, it's very common. An actuator gear gets stripped, causing jerky power to be applied to the front wheels. When the gear strips completely, the DTC light, ABS, and 4x4 lights come on and stay on. If you don't have xdrive, this can't be it. Regarding turning DTC off being "unsafe", I wouldn't worry about it. This feature didn't exist in any cars until the 1990s, and somehow we were all able to survive. However, you're right that it doesn't address the root cause.
	Appreciate 0 Quote

12-11-2016, 05:22 AM	#10
UltraV New Member 2 Rep 20 Posts Drives: 2007 e90 Join Date: May 2016 Location: London iTrader: (0)	I have an OBD2 reader and software , do you think it will throw up error codes even without engine management light on? It is not an XDrive its 2007 E90 320D M-Sport, it is just so strange that it is even causing problems with turning the DTC off :\|
	Appreciate 0 Quote