no CEL for catless downpipe

bmwchue · 01-31-2018, 04:28 PM

im seeing alot of members here getting cel for the o2 sensor after putting in a catless downpipe. I have jb4 with VRSF catless downpipe with a dorman 42009 spark plug non-fouler $6 (buy it at autozone/oreilly) installed with the rear 02 sensor. This had worked for me from the start and never received a cel. good luck.

MONSTAR · 01-31-2018, 05:38 PM

Thanks Chue. This keeps coming up a lot lately.

Relax19 · 02-02-2018, 09:12 AM

I thought the JB4 removes the CEL for catless downpipes.

SalazF30 · 02-02-2018, 09:14 AM

Quote:

Originally Posted by Relax19

I thought the JB4 removes the CEL for catless downpipes.

BMS is trying to get the JB4 to be CARB legal so they had to remove the CEL delete

Phil2thejay · 02-05-2018, 10:58 AM

Sub'd for long term results. I have heard that they do not last, but would like to see your experience.

MONSTAR · 02-05-2018, 11:20 AM

I just picked one up from O'reilly's, same part number actually. It looks like it comes with 2 in the package (same as above). Planning to do a muffler delete in the next few months; I'll have the shop throw it in when they're doing the work and report back

bmwchue · 02-05-2018, 12:06 PM

Quote:

Originally Posted by Phil2thejay

Sub'd for long term results. I have heard that they do not last, but would like to see your experience.

2 months now so far good

Mike@N54Tuning.com · 02-05-2018, 01:44 PM

Quote:

Originally Posted by bmwchue

2 months now so far good

Wow.. Pretty impressed its gone that long without a CEL..

Mike

drivef30 · 02-05-2018, 03:34 PM

Did you use 1 or both of them in the package?

bmwchue · 02-05-2018, 04:56 PM

Quote:

Originally Posted by Mike@N54Tuning.com

Wow.. Pretty impressed its gone that long without a CEL..

Mike

This is what i used back in my honda days and it worked so i figure why not on a bmw lol

bmwchue · 02-05-2018, 04:57 PM

Quote:

Originally Posted by drivef30

Did you use 1 or both of them in the package?

One only

CandyRedRC46 · 02-06-2018, 01:56 PM

This is great. Thank you a bunch. I am going to be installing an AFE catless downpipe and Supersprint front pipe soon, so this is perfect timing.

Sonic RR · 03-05-2018, 05:58 PM

Any one "explain like I'm 5" on how this works?

Sonic

rjd_F30 · 03-05-2018, 08:28 PM

Quote:

Originally Posted by Sonic RR

Any one "explain like I'm 5" on how this works?

Sonic

it removes the O2 sensor from direct contact with emissions by spacing it back from the flow of exhaust gases a bit. therefore causing the sensor to detect less harmful gases than are actually being produced.

drivef30 · 03-05-2018, 08:30 PM

Puts the o2 sensor futher away from the airflow, causing the sensor to pick up less unburnt fuel (I believe no2,co)... orginally, the cats is designed to turn those gases into N2 and CO2... When putting the sensor further back it, the o2 sensor picks up less of those harmful gases and thinks the cat is still installed and working fine.

carbon428i · 03-05-2018, 10:23 PM

I've been running a catless downpipe and JB4 for about two months now and did not receive CEL, although I did get codes once or twice on the JB4 "catless downpipe detected"

Fr3sh · 06-22-2018, 12:17 AM

Will this fit the 428ix? Sorry for the late chime-in... bmwchue have you gotten any cel codes?

rjd_F30 · 06-22-2018, 03:41 PM

Quote:

Originally Posted by Fr3sh

Will this fit the 428ix? Sorry for the late chime-in... bmwchue have you gotten any cel codes?

Yes, it will fit anything with an O2 sensor I believe. It's not fool proof, but you shouldn't get a CEL with it.

Fr3sh · 06-24-2018, 11:07 PM

So I installed the 02 spacer today and about 50+miles I read a code
- 128901 lambda probe before catalytic converters, dynamic: slow reaction mean?
I cleared the code and hasn’t come back since, should I be worried or is it just the jb4 via Bluetooth app telling me I have catless? (er catless)

bmwchue · 06-25-2018, 09:17 AM

6months into still no code

Sweeney921 · 06-25-2018, 01:09 PM

Quote:

Originally Posted by bmwchue

6months into still no code

Just thinking out loud here, but do you just replace the non-fouler with a new one if/when the CEL comes back?

bmwchue · 06-26-2018, 03:20 PM

if mine would come on by chance I would either clean it or replace it. if that doesn't work I'll extend it

01-31-2018, 04:28 PM	#1
bmwchue Captain 242 Rep 804 Posts Drives: 2013 bmw 328i Join Date: Oct 2017 Location: California iTrader: (0)	no CEL for catless downpipe im seeing alot of members here getting cel for the o2 sensor after putting in a catless downpipe. I have jb4 with VRSF catless downpipe with a dorman 42009 spark plug non-fouler $6 (buy it at autozone/oreilly) installed with the rear 02 sensor. This had worked for me from the start and never received a cel. good luck. Attached Images
	Appreciate 11 MONSTAR516.00 terryd5150507.00 F30328iN20201341.50 CandyRedRC46242.00 Sonic RR114.00 Aekdbrich173.00 Alpine3s14.50 Noelified228.00 sspade2464.50 negacy17.00 Zanity731.00 Tweet Quote

01-31-2018, 05:38 PM	#2
MONSTAR #gotboost 516 Rep 861 Posts Drives: 2018 M2 Join Date: Sep 2016 Location: Irvine, California iTrader: (0)	Thanks Chue. This keeps coming up a lot lately. __________________ 2018 F87 M2 (09/2020 - ) Dinan Cold Air Intake \|Dinan Axle Back \| VRSF 6.5" Intercooler \| VRSF Catless Downpipe \| VRSF Charge Pipes \| BM3 \| MST Inlet v2 \| Turbosmart VR11 2013 F30 328i (12/2015 - 09/2020) SOLD!
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02-02-2018, 09:12 AM	#3
Relax19 Private 23 Rep 51 Posts Drives: car Join Date: Jan 2017 Location: socal iTrader: (0)	I thought the JB4 removes the CEL for catless downpipes.
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02-05-2018, 10:58 AM	#5
Phil2thejay EBII F30 N26 M-Sport 63 Rep 152 Posts Drives: F30 N26 M-Sport Join Date: Oct 2013 Location: Boston, Massachusetts iTrader: (0)	Sub'd for long term results. I have heard that they do not last, but would like to see your experience. __________________ EBII F30 N26 M-Sport Injen \| H&R \| VR Speed Factory\| FTP Motorsports \| RW Carbon \| Custom Exhaust \| Custom Splitter \| Custom Tune: 264WHP and 319WTQ at 20PSI \| Instagram @myboiblu328
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02-05-2018, 11:20 AM	#6
MONSTAR #gotboost 516 Rep 861 Posts Drives: 2018 M2 Join Date: Sep 2016 Location: Irvine, California iTrader: (0)	I just picked one up from O'reilly's, same part number actually. It looks like it comes with 2 in the package (same as above). Planning to do a muffler delete in the next few months; I'll have the shop throw it in when they're doing the work and report back __________________ 2018 F87 M2 (09/2020 - ) Dinan Cold Air Intake \|Dinan Axle Back \| VRSF 6.5" Intercooler \| VRSF Catless Downpipe \| VRSF Charge Pipes \| BM3 \| MST Inlet v2 \| Turbosmart VR11 2013 F30 328i (12/2015 - 09/2020) SOLD!
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02-05-2018, 03:34 PM	#9
drivef30 Lieutenant 111 Rep 463 Posts Drives: 17' 340i xDrive M-Sport Join Date: Aug 2017 Location: Michigan, USA iTrader: (2)	Did you use 1 or both of them in the package?
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02-06-2018, 01:56 PM	#12
CandyRedRC46 Lieutenant 242 Rep 420 Posts Drives: 2013 328i Join Date: Feb 2018 Location: Florida iTrader: (0)	This is great. Thank you a bunch. I am going to be installing an AFE catless downpipe and Supersprint front pipe soon, so this is perfect timing.
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03-05-2018, 05:58 PM	#13
Sonic RR I drink and I pretend to know things. 114 Rep 224 Posts Drives: 320I XDRIVE BASE TRASH Join Date: Apr 2010 Location: Oh-town iTrader: (0)	Any one "explain like I'm 5" on how this works? Sonic
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03-05-2018, 08:30 PM	#15
drivef30 Lieutenant 111 Rep 463 Posts Drives: 17' 340i xDrive M-Sport Join Date: Aug 2017 Location: Michigan, USA iTrader: (2)	Puts the o2 sensor futher away from the airflow, causing the sensor to pick up less unburnt fuel (I believe no2,co)... orginally, the cats is designed to turn those gases into N2 and CO2... When putting the sensor further back it, the o2 sensor picks up less of those harmful gases and thinks the cat is still installed and working fine.
	Appreciate 0 Quote

03-05-2018, 10:23 PM	#16
carbon428i Lieutenant 68 Rep 450 Posts Drives: 2014 BMW 428i M Sport Join Date: Nov 2017 Location: New York, NY iTrader: (1)	I've been running a catless downpipe and JB4 for about two months now and did not receive CEL, although I did get codes once or twice on the JB4 "catless downpipe detected" __________________ 2014 Black Sapphire Metallic F32 428i xDrive M Sport \| Gloss Black Striped Dual Slat Kidney Grills \| CF M4 Style Mirror Caps \| CF M4 Style Trunk Spoiler \| CF Rear Diffuser \| Rohana RFX5 Gloss Gold 20" \| CF Wrapped Interior \| BM3 Stage 2 93 Agg Tune \| VRSF Catless Downpipe \| Evolution Racewerks Chargepipe \| Pheonix Racing Intercooler \| K&N Drop In Filter\|
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06-22-2018, 12:17 AM	#17
Fr3sh #im_2_Fr3sh 30 Rep 247 Posts Drives: Bmw 428i xdrive Join Date: Jan 2018 Location: Ny iTrader: (0)	Will this fit the 428ix? Sorry for the late chime-in... bmwchue have you gotten any cel codes? __________________ 2014 428i xDrive F32 \| Injen Cai \| Er Intercooler \| Er Chargepipe \| Er Tic Pipe \| Er Catless Downpipe \| Bm3 - Cary Jordan tuned 93 oct \| Gfb Dv \| Ngk L/I Spark Plugs \| Cf High Kick Trunk Spoiler v1 \| Black Grilles \| 35% Suntek Tints \| Michelin pss4 \| Awe Quad Exhaust w/ Resonated Midpipe \| Interior Mods \| Mst Turbo Inlet \| Pure Stage 2 Turbo \| Arp rod bolts \| Fuel-it Stage 2 Lpfp \| Braum Elite x seats \| Mishimoto Oil-catch can \|
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06-24-2018, 11:07 PM	#19
Fr3sh #im_2_Fr3sh 30 Rep 247 Posts Drives: Bmw 428i xdrive Join Date: Jan 2018 Location: Ny iTrader: (0)	So I installed the 02 spacer today and about 50+miles I read a code - 128901 lambda probe before catalytic converters, dynamic: slow reaction mean? I cleared the code and hasn’t come back since, should I be worried or is it just the jb4 via Bluetooth app telling me I have catless? (er catless) __________________ 2014 428i xDrive F32 \| Injen Cai \| Er Intercooler \| Er Chargepipe \| Er Tic Pipe \| Er Catless Downpipe \| Bm3 - Cary Jordan tuned 93 oct \| Gfb Dv \| Ngk L/I Spark Plugs \| Cf High Kick Trunk Spoiler v1 \| Black Grilles \| 35% Suntek Tints \| Michelin pss4 \| Awe Quad Exhaust w/ Resonated Midpipe \| Interior Mods \| Mst Turbo Inlet \| Pure Stage 2 Turbo \| Arp rod bolts \| Fuel-it Stage 2 Lpfp \| Braum Elite x seats \| Mishimoto Oil-catch can \|
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06-25-2018, 09:17 AM	#20
bmwchue Captain 242 Rep 804 Posts Drives: 2013 bmw 328i Join Date: Oct 2017 Location: California iTrader: (0)	6months into still no code
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06-26-2018, 03:20 PM	#22
bmwchue Captain 242 Rep 804 Posts Drives: 2013 bmw 328i Join Date: Oct 2017 Location: California iTrader: (0)	if mine would come on by chance I would either clean it or replace it. if that doesn't work I'll extend it
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