THE LARGEST BMW 2-SERIES FORUM ON THE PLANET
2Addicts
2Addicts
BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read
2Addicts | BMW 2-Series forum BIMMERPOST Universal Forums General BMW News and Cars Discussion Dealer claims all diesels go into limp mode. True?

Post Reply
 
Thread Tools Search this Thread
      02-16-2018, 05:13 AM   #1
Sarlech
Private First Class
Sarlech's Avatar
United Kingdom
16
Rep
153
Posts

Drives: BMW E92 M Sport 320d
Join Date: Aug 2016
Location: West Midlands

iTrader: (0)

Garage List
Dealer claims all diesels go into limp mode. True?

Hi guys

I went to test drive a 640d a few days ago - it had been at the showroom for approx. 2 weeks, I took it for a test drive (after driving approx 200m down the road a warning light displayed a problem with the drivetrain (can't remember the exact wording)) and went into limp mode

The guy then said most diesels do this at his garage due to being constantly stop-started when moving them around, and would just require a flush due to the DPF

Is this correct or is it likely to be something more serious?

Thanks in advance
Appreciate 0
      02-16-2018, 07:21 AM   #2
bvanlieu
Second Lieutenant
57
Rep
268
Posts

Drives: Alpine 335d
Join Date: Nov 2013
Location: PA

iTrader: (0)

Like many M57 enthusiasts in the US, mine has thrown a few codes frequently: about ever 6 months. Never has it gone into limp mode. I also had a CBU service done after 70K so know how they can run rough but still run with that ailment.

This sounds like poppycock to me.

- b
Appreciate 2
      02-16-2018, 07:33 AM   #3
Maynard
Colonel
United_States
3805
Rep
2,860
Posts

Drives: 228iX & M2C
Join Date: Mar 2016
Location: Upstate NY

iTrader: (1)

Excellent leverage to get them to throw in a complimentary warranty extension?
Appreciate 0
      02-16-2018, 10:30 AM   #4
floydarogers
Curmudgeon and Pedant
floydarogers's Avatar
United_States
690
Rep
3,489
Posts

Drives: 2010 335d, 2014 328d
Join Date: Nov 2012
Location: Bellevue, WA

iTrader: (0)

There may be some confusion in what is called "limp mode".

There are two levels of Service Engine Soon (also called Check Engine Light): yellow light indicating a need for repair to correct an engine problem causing excess pollution or other minor problem. Red to indicate a more serious problem with the engine (usually accompanied with rough running/missing.)

The 2nd condition often is accompanied with a "limp" mode, which reduces power and can force you to stop the car and get a tow.

Modern BMW diesels with the BlueTec pollution control hardware often (!!!) set the yellow SES because the system detected that more NOx than spec was being emitted. This check occurs every DPF regeneration cycle (about every tankful/500 miles). If it goes out at the next regeneration, (has happened to my 335d 5-6 times), you're good to go (although be warned eventually it will stay on - these systems are so fragile.)

The salesman is full of it. SES is not supposed to happen in the normal operation of the vehicle. There is no way the salesman could tell you without attaching an OBD reader to the car, that the problem could be ignored.
Appreciate 2
      02-16-2018, 11:43 AM   #5
Sarlech
Private First Class
Sarlech's Avatar
United Kingdom
16
Rep
153
Posts

Drives: BMW E92 M Sport 320d
Join Date: Aug 2016
Location: West Midlands

iTrader: (0)

Garage List
Quote:
Originally Posted by floydarogers View Post
There may be some confusion in what is called "limp mode".

There are two levels of Service Engine Soon (also called Check Engine Light): yellow light indicating a need for repair to correct an engine problem causing excess pollution or other minor problem. Red to indicate a more serious problem with the engine (usually accompanied with rough running/missing.)

The 2nd condition often is accompanied with a "limp" mode, which reduces power and can force you to stop the car and get a tow.

Modern BMW diesels with the BlueTec pollution control hardware often (!!!) set the yellow SES because the system detected that more NOx than spec was being emitted. This check occurs every DPF regeneration cycle (about every tankful/500 miles). If it goes out at the next regeneration, (has happened to my 335d 5-6 times), you're good to go (although be warned eventually it will stay on - these systems are so fragile.)

The salesman is full of it. SES is not supposed to happen in the normal operation of the vehicle. There is no way the salesman could tell you without attaching an OBD reader to the car, that the problem could be ignored.
Quote:
Originally Posted by floydarogers View Post
There may be some confusion in what is called "limp mode".

There are two levels of Service Engine Soon (also called Check Engine Light): yellow light indicating a need for repair to correct an engine problem causing excess pollution or other minor problem. Red to indicate a more serious problem with the engine (usually accompanied with rough running/missing.)

The 2nd condition often is accompanied with a "limp" mode, which reduces power and can force you to stop the car and get a tow.

Modern BMW diesels with the BlueTec pollution control hardware often (!!!) set the yellow SES because the system detected that more NOx than spec was being emitted. This check occurs every DPF regeneration cycle (about every tankful/500 miles). If it goes out at the next regeneration, (has happened to my 335d 5-6 times), you're good to go (although be warned eventually it will stay on - these systems are so fragile.)

The salesman is full of it. SES is not supposed to happen in the normal operation of the vehicle. There is no way the salesman could tell you without attaching an OBD reader to the car, that the problem could be ignored.
Thanks for information on this - much appreciated
Appreciate 0
      02-16-2018, 09:19 PM   #6
NormanConquest
That Libertarian Guy
NormanConquest's Avatar
4039
Rep
6,363
Posts

Drives: 340i
Join Date: May 2017
Location: Earth

iTrader: (0)

Diesel cars are only good if you do 30 mile trips on highway with no traffic daily
Appreciate 0
      02-17-2018, 05:44 AM   #7
Sarlech
Private First Class
Sarlech's Avatar
United Kingdom
16
Rep
153
Posts

Drives: BMW E92 M Sport 320d
Join Date: Aug 2016
Location: West Midlands

iTrader: (0)

Garage List
I do approx 15-17k a year; 90% of which are motorway miles; a petrol wouldn't be any good to me
Appreciate 0
      02-17-2018, 07:40 AM   #8
NormanConquest
That Libertarian Guy
NormanConquest's Avatar
4039
Rep
6,363
Posts

Drives: 340i
Join Date: May 2017
Location: Earth

iTrader: (0)

Quote:
Originally Posted by Sarlech View Post
I do approx 15-17k a year; 90% of which are motorway miles; a petrol wouldn't be any good to me
Then you should be fine since that will allow for a regen. Some people buy diesel and do short distance city driving which prevent their car from having enough time to perform a regen which results in the most common diesel breakdown occurring now. To avoid that you need to buy a car with a Manuel regen mode that allows you to sit in a parking lot for 30 minutes while it cleans the system.
Appreciate 0
Post 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 06:10 PM.




2addicts
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
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