E90Post
 


GetBMWParts
 
BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > NA Engine (non-turbo) / Drivetrain / Exhaust Modifications > C998 error code



Reply
 
Thread Tools Search this Thread
      03-25-2013, 03:36 PM   #1
dolmaxdog
New Member
3
Rep
9
Posts

Drives: 11 535xi
Join Date: Dec 2011
Location: nyc

iTrader: (0)

C998 error code

Anyone have any idea what C998 error code is?

Dynamic stability control DXC8 Plus - E90

Current Fault Codes
C998:


Thanks...
Appreciate 0
      06-07-2013, 06:37 PM   #2
WallyF
First Lieutenant
WallyF's Avatar
United_States
48
Rep
320
Posts

Drives: 2006 325xi & 2018 X3 iDrive30i
Join Date: Oct 2005
Location: Fort Wayne, IN

iTrader: (1)

Garage List
Fault code c998

I just purchased a wifi elm 327 scanner and performed diagnostic test of my 2006 325xi using the BMWhat lite app for my iPad.

I also got a c998 fault code and can't find it in the list of fault code.

Can anyone point us in the right direction to get an idea of the problem?

Wallyf
Appreciate 0
      06-08-2013, 03:16 AM   #3
1AddictsAnonymous
Captain
1AddictsAnonymous's Avatar
Canada
159
Rep
776
Posts

Drives: 08 135i M Sport 6MT
Join Date: Feb 2013
Location: Edmonton

iTrader: (2)

Garage List
2008 BMW 135i  [5.00]
Looks like it's ABS related http://www.bimmerforums.co.uk/forum/...-fault-t55709/
__________________
2008 Sedona Red 135i ///M Sport Year One of the 1
LCI Headlights | LCI Blacklines | LUX V5 | Carbon Interior Trim | Custom Red Interior Stitching | Alarm Retrofit | Flat Black Grilles | Performance Spoiler Rep
JB4 | ER Charge Pipe | BMW Performance Exhaust | E46 M3 Transmission Mounts | BMS OCC

Appreciate 0
      06-24-2013, 09:54 PM   #4
james520
New Member
0
Rep
26
Posts

Drives: bmw
Join Date: Mar 2013
Location: usa

iTrader: (0)

error code table:http://www.spobd2.com/service/diagno...wnload-38.html
Appreciate 0
      07-24-2013, 01:19 AM   #5
BimMic
New Member
0
Rep
7
Posts

Drives: Touring
Join Date: Jul 2013
Location: NewYork

iTrader: (0)

This is unfortunately only the OBD codes and not the BMW fault codes list. Do you also have a link to the BMW specific DTC codes that BMWhat finds - or does the App also provide the corresponding full fault text already?
Appreciate 0
      02-06-2015, 08:22 AM   #6
dave4
Second Lieutenant
dave4's Avatar
40
Rep
216
Posts

Drives: BMW 330xi
Join Date: Jun 2012
Location: VA

iTrader: (1)

Quote:
Originally Posted by dolmaxdog View Post
Anyone have any idea what C998 error code is?

Dynamic stability control DXC8 Plus - E90

Current Fault Codes
C998:


Thanks...
Sorry to bring back such an old thread but did you ever figure out what was wrong with the car? I also have the C998 code for wheel Tolerance control failure F-CAN but no light on the dash.
Appreciate 0
      06-30-2015, 02:39 PM   #7
WallyF
First Lieutenant
WallyF's Avatar
United_States
48
Rep
320
Posts

Drives: 2006 325xi & 2018 X3 iDrive30i
Join Date: Oct 2005
Location: Fort Wayne, IN

iTrader: (1)

Garage List
C998 code for wheel Tolerance control failure F-CAN

I still have this fault code after a new scan on June 30, 2015.

Then I was thinking, about two years ago I got a tire pressure low fault on my 2006 325xi using my ELM327 scanner. The front left was down 2 psi from the other three tires. I corrected this low tire and reset the tire monitoring function in the OBC.

Maybe the C998 fault is still left over from this low pressure situation.

I will clear the fault and drive the car for a week to see if the C998 fault reappears. I will report back also.

Wallyf
Appreciate 0
      10-04-2015, 09:12 AM   #8
WallyF
First Lieutenant
WallyF's Avatar
United_States
48
Rep
320
Posts

Drives: 2006 325xi & 2018 X3 iDrive30i
Join Date: Oct 2005
Location: Fort Wayne, IN

iTrader: (1)

Garage List
C998 still there

I still have the C998 fault code even after clearing it several times, checking my tire pressure and "resetting" the tire monitoring function.

An internet search comes up blank except that Pelican Parts says it has to do with the ABS/DSC system.

I believe that my system is an ABS 3 since the 2006 3 series was the first year for the Run Flat Tires(RFTs). The fault is somehow related to the "long term" comparison of the rotation of the four wheels; i.e. flat tire monitoring. The 2006 does not have a TPMS and relies on this tire rotation comparison to identify a flat tire.
Here is the description I found:
ABS 3 / DSC
The ABS 3 system added yet more features to the previous systems, such as individual wheel speed comparison over long terms. Gathering the wheel rotation data, and comparing it is accurate enough to identify differences in tyre tread wear, but its main use was as part of a tyre pressure monitoring system. Decreases in the rolling circumference of the tyre from tyre deflation could be monitored as a passive system to identify low pressure in Run Flat Tyres which would often be hard to notice otherwise.


I have checked my tire pressure and have set them to the same value but still get this fault code. Therefore, I must have a slight difference in the diameter of one or more wheel/tire combination.

I welcome any comments into my conclusion.

Wallyf
Appreciate 0
      12-19-2015, 09:46 PM   #9
zzzzoom
New Member
6
Rep
22
Posts

Drives: 2007 335i FBO AUTO
Join Date: Feb 2015
Location: Canada

iTrader: (0)

News on this?

Hi there,

Did you determine what the issue was?

Same code here, with no light.
Appreciate 0
      08-15-2018, 08:05 PM   #10
DPDISXR4Ti
New Member
United_States
0
Rep
9
Posts

Drives: 2006 325xi
Join Date: Jul 2018
Location: New York

iTrader: (0)

Add me to the list of having a C998 error which comes back immediately upon clearing. Has anyone found a fix?
Appreciate 0
      09-09-2018, 05:01 PM   #11
WallyF
First Lieutenant
WallyF's Avatar
United_States
48
Rep
320
Posts

Drives: 2006 325xi & 2018 X3 iDrive30i
Join Date: Oct 2005
Location: Fort Wayne, IN

iTrader: (1)

Garage List
New BMW code decoder

I found a new BMW code decoder.. it is at http://bmwfault.codes.

For the C998 fault code, it shows two potential issues:


C998 DSC: Insignificant SZL fault: clear fault memory, ECU variant: dxc_70. ECU Label: Dynamic stability control EHB3

C998 SZL: Wheel speed, ECU variant:szl_60, ECU Label: Switch center, steering column

My Carly scan diagnostics shows insiginificant wheel speed tolerance problem.
Any ideas?

Wallyf
Appreciate 0
      09-10-2018, 02:53 PM   #12
DPDISXR4Ti
New Member
United_States
0
Rep
9
Posts

Drives: 2006 325xi
Join Date: Jul 2018
Location: New York

iTrader: (0)

Thanks for checking back in on this thread. I have a brake pad sensor here in a bag that I purchased, hoping it might be the fix for the C998 error. I've yet to install it, but I figured for $5 it was worth being a "parts-swapper mechanic".

With the new info you've provided, it doesn't sound encouraging that I'm running down the right path.
Appreciate 0
      09-10-2018, 05:33 PM   #13
WallyF
First Lieutenant
WallyF's Avatar
United_States
48
Rep
320
Posts

Drives: 2006 325xi & 2018 X3 iDrive30i
Join Date: Oct 2005
Location: Fort Wayne, IN

iTrader: (1)

Garage List
Radtoleranzabgleich or wheel toleranceadjustment

I just ran a diagnostic scan with Carly Pro and my ELM327. The C998 fault shows up. It shows up in the DCS/ABS/Brake and System area. It does not show up as a fault on the carís dash.

Originally I got this fault only in the DCS/ABS/Brake area. It indicated a wheel tolerance adjustment. I thought it meant the four vehicle running wheels. Now based on other info, I wonder if the wheel is the steering wheel. Apparently the steering wheel angle sensor or switch SZL is a know problem area.

Any comments?

I am going to my Indy and have them do a scan with their scanner. I will discuss my scan with them.

Wallyf
Appreciate 0
      09-10-2018, 07:42 PM   #14
bluewater328
Lieutenant
United_States
90
Rep
468
Posts

Drives: 2011 bluewater 328i LCI sedan
Join Date: Aug 2010
Location: Hawaii

iTrader: (0)

Check the Wheel Speed Sensor. If you're pulling from Carly though, I think it might identify it if that was the case.
Appreciate 0
      09-13-2018, 07:19 AM   #15
WallyF
First Lieutenant
WallyF's Avatar
United_States
48
Rep
320
Posts

Drives: 2006 325xi & 2018 X3 iDrive30i
Join Date: Oct 2005
Location: Fort Wayne, IN

iTrader: (1)

Garage List
Wheel speed sensor(s)

Aren't there four wheel speed sensors; one on each wheel? That is what I am trying to monitor. In the Carly software "parameters" area, I don't see wheel speed sensor(s).

Wallyf
Appreciate 0
      09-13-2018, 07:23 PM   #16
bluewater328
Lieutenant
United_States
90
Rep
468
Posts

Drives: 2011 bluewater 328i LCI sedan
Join Date: Aug 2010
Location: Hawaii

iTrader: (0)

Quote:
Originally Posted by WallyF View Post
Aren't there four wheel speed sensors; one on each wheel? That is what I am trying to monitor. In the Carly software "parameters" area, I don't see wheel speed sensor(s).

Wallyf
It's called a wheel speed sensor, but it really has more to do with the brakes. There are two modules, one in front (passenger side IIRC) and one in the back (which IIRC was the driver's side). It sits on the inside wall of the wheel well:
https://www.fcpeuro.com/products/bmw...0711-6241-3-02



I want to say it's the front that's usually the culprit. But anyway, cheap to check compared to a full DSC rebuild, and very cheap compared to a new unit. Others have also mentions Steering angle sensor (there's a DIY tutorial on that solution).

Last edited by bluewater328; 09-13-2018 at 07:30 PM.
Appreciate 0
      09-14-2018, 05:59 AM   #17
WallyF
First Lieutenant
WallyF's Avatar
United_States
48
Rep
320
Posts

Drives: 2006 325xi & 2018 X3 iDrive30i
Join Date: Oct 2005
Location: Fort Wayne, IN

iTrader: (1)

Garage List
There are four (4) wheel speed sensors

Bluewater328,

There are total of four wheel speed sensors. Each wheel has one so that the ABS, DSC and the xDrive can function. On my 325xi the front sensors are
34526764858 and the rear are 34526764859.

Look on the RealOEM.com website in the Front and Rear suspension areas.

I think my sensors are ok as I donít get a fault on my dash. I think that the cogs(teeth) get gummed up and do not register all of the cogs. Finding the bad wheel(s).is what I am trying to do.

Wallyf
Appreciate 0
      10-18-2018, 08:07 PM   #18
bidjan
New Member
Canada
0
Rep
12
Posts

Drives: 2006 325xi E90
Join Date: Apr 2011
Location: Milton, Ontario

iTrader: (0)

I have the same fault code. Anybody find a confirm a resolution? Reached out to my indy BMW mechanic, and will post anything I find out.
Appreciate 0
Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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


All times are GMT -5. The time now is 05:36 AM.




e90post
Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST