F30POST
F30POST
2012-2015 BMW 3-Series and 4-Series Forum
BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read
BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > 2012-2019 BMW 3 and 4-Series Forums > General F30 Sedan / F32 Coupe / F36 Gran Coupe Forum > CEL light with sports cat
Extreme Powerhouse
Post Reply
 
Thread Tools Search this Thread
      09-27-2021, 11:27 AM   #1
F36 435i M
New Member
2
Rep
26
Posts

Drives: BMW 435i GC
Join Date: Jul 2021
Location: Uk

iTrader: (0)

CEL light with sports cat

Hi guys,

Just recently had a sports cat installed and when I picked up the car a few days ago there was no CEL and was completely fine. About 50 miles later a CEL has appeared today, the car is a N55 435i 2015. Do I need to get this coded out right away or can I leave this for a while? Been told itís possible for the car to go into limp mode ? Not sure how true this is. Any advice would be great, thanks again!
Appreciate 0
      09-27-2021, 12:39 PM   #2
Fliplegend
Lieutenant
Fliplegend's Avatar
United_States
317
Rep
453
Posts

Drives: 2015 328xi
Join Date: Nov 2018
Location: NH

iTrader: (0)

Wouldn't be surprised if the CEL came on at the shop and they just cleared it and gave you the car back.
__________________
15' 328ix Mineral White | Saddle Brown | Luxury | SAT
Appreciate 0
      09-27-2021, 01:31 PM   #3
thejeremyman9
Brigadier General
thejeremyman9's Avatar
2475
Rep
4,894
Posts

Drives: 2015 BMW 335i
Join Date: May 2019
Location: Cali

iTrader: (0)

Also tell us what downpipe it is, unless its AA, fabspeed, or CG precision the CEL is expected.
Appreciate 1
      09-27-2021, 02:52 PM   #4
Boostedphil698
Captain
Boostedphil698's Avatar
United_States
204
Rep
679
Posts

Drives: 2015 BMW 435i Xdrive Sportline
Join Date: Mar 2020
Location: Greater Philadelphia

iTrader: (0)

Garage List
2015 BMW 435XI  [0.00]
2009 Honda Civic  [0.00]
Piggy backing off thejeremyman9, unless it is AA, Fabspeed or CG, you were doomed to get a CEL from the start. Let us know the brand and we can go from there.
__________________
2015 435i Xdrive (Klaus)
Stanced 8th Gen Honda Civic (The daily)
Appreciate 0
      09-27-2021, 03:54 PM   #5
F36 435i M
New Member
2
Rep
26
Posts

Drives: BMW 435i GC
Join Date: Jul 2021
Location: Uk

iTrader: (0)

Thanks for the replies. Been speaking to Jeremy, just a case of getting it mapped out. Just hoping it doesn’t need doing too soon, shouldn’t be urgent
Appreciate 0
      09-27-2021, 09:29 PM   #6
njdangelo
Captain
njdangelo's Avatar
303
Rep
622
Posts

Drives: 340i xdrive Msport THP
Join Date: Sep 2019
Location: CT

iTrader: (0)

My cts turbo catted downpipe has never thrown a CEL
__________________
340i Xdrive Estoril Blue II - Track handling package - Dinan springs/bumpstops - Remus exhaust - AP intake - CTS Turbo Catted Downpipe - BM3 stage 2 - XHP Stage 3 - Carbon fiber interior trim
Appreciate 0
      09-27-2021, 10:12 PM   #7
thejeremyman9
Brigadier General
thejeremyman9's Avatar
2475
Rep
4,894
Posts

Drives: 2015 BMW 335i
Join Date: May 2019
Location: Cali

iTrader: (0)

Quote:
Originally Posted by njdangelo View Post
My cts turbo catted downpipe has never thrown a CEL
Do you have it disabled with the tune?

Does your catalyst emission monitor show as ready?
Appreciate 0
      09-27-2021, 10:15 PM   #8
njdangelo
Captain
njdangelo's Avatar
303
Rep
622
Posts

Drives: 340i xdrive Msport THP
Join Date: Sep 2019
Location: CT

iTrader: (0)

Quote:
Originally Posted by thejeremyman9 View Post
Quote:
Originally Posted by njdangelo View Post
My cts turbo catted downpipe has never thrown a CEL
Do you have it disabled with the tune?

Does your catalyst emission monitor show as ready?
No and yes. I did purchase an extender in case I ever needed it but it's been fine since install. I know others have experienced different results so I'm wondering what contributes to the CEL in those conditions.
Only thing I can think is a dirty burn. I change my oil every 5k and the plugs are only 15k old so maybe that helps.
__________________
340i Xdrive Estoril Blue II - Track handling package - Dinan springs/bumpstops - Remus exhaust - AP intake - CTS Turbo Catted Downpipe - BM3 stage 2 - XHP Stage 3 - Carbon fiber interior trim
Appreciate 0
      09-28-2021, 12:52 AM   #9
thejeremyman9
Brigadier General
thejeremyman9's Avatar
2475
Rep
4,894
Posts

Drives: 2015 BMW 335i
Join Date: May 2019
Location: Cali

iTrader: (0)

Quote:
Originally Posted by njdangelo View Post
No and yes. I did purchase an extender in case I ever needed it but it's been fine since install. I know others have experienced different results so I'm wondering what contributes to the CEL in those conditions.
Only thing I can think is a dirty burn. I change my oil every 5k and the plugs are only 15k old so maybe that helps.
Interesting, is this a recent purchase? Some DPs go through some iterations. Could also just be variation in cat quality. Also, usually the harder to drive it the more likely it is, since this makes the cat "work harder" than just babying the car so the DME can pick up on small variations vs OEM.
Appreciate 0
      09-28-2021, 05:32 AM   #10
njdangelo
Captain
njdangelo's Avatar
303
Rep
622
Posts

Drives: 340i xdrive Msport THP
Join Date: Sep 2019
Location: CT

iTrader: (0)

Quote:
Originally Posted by thejeremyman9 View Post
Quote:
Originally Posted by njdangelo View Post
No and yes. I did purchase an extender in case I ever needed it but it's been fine since install. I know others have experienced different results so I'm wondering what contributes to the CEL in those conditions.
Only thing I can think is a dirty burn. I change my oil every 5k and the plugs are only 15k old so maybe that helps.
Interesting, is this a recent purchase? Some DPs go through some iterations. Could also just be variation in cat quality. Also, usually the harder to drive it the more likely it is, since this makes the cat "work harder" than just babying the car so the DME can pick up on small variations vs OEM.
It's been installed for just over a year now and I've done two track days with it
__________________
340i Xdrive Estoril Blue II - Track handling package - Dinan springs/bumpstops - Remus exhaust - AP intake - CTS Turbo Catted Downpipe - BM3 stage 2 - XHP Stage 3 - Carbon fiber interior trim
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 04:56 AM.




f30post
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, 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