E90 335i Catless NY Emissions

Ntmager · 08-02-2022, 12:22 PM

Hi

I just bought a 335i from another state and it's catless. Is there any way for me to pass a NY state inspection without changing the exhaust setup? I bought the car knowing that most likely I will have to go back to stock, but I'm just fishing for ideas.

Thanks

Navykiller · 08-02-2022, 01:26 PM

Find out how many monitors can be "not ready" in NJ you can have 1 i believe without failing, this case would be the Cats. You WILL need either a jb4 BEF or a MHD Tune to have the CEL light off, Allegedly, since any of this is illegal so Im speaking hypothetically in theory.

Ntmager · 08-02-2022, 01:41 PM

Quote:

Originally Posted by Navykiller

Find out how many monitors can be "not ready" in NJ you can have 1 i believe without failing, this case would be the Cats. You WILL need either a jb4 BEF or a MHD Tune to have the CEL light off, Allegedly, since any of this is illegal so Im speaking hypothetically in theory.

Thanks for the response. I have and MHD tune, but am still getting a CEL. Should I reflash it?

Navykiller · 08-02-2022, 03:03 PM

what codes is it throwing? It may be something not related

Ntmager · 08-02-2022, 03:08 PM

Quote:

Originally Posted by Navykiller

what codes is it throwing? It may be something not related

I'm getting 3 codes they are as follows: P114D P114B and P0041. Also when I do a monitor test I am failing Cat, EVAP and HRT.

Navykiller · 08-02-2022, 03:29 PM

Quote:

Originally Posted by Ntmager

I'm getting 3 codes they are as follows: P114D P114B and P0041. Also when I do a monitor test I am failing Cat, EVAP and HRT.

Are you pulling those codes through MHD or a code reader? They look like generic codes, not BMW 4 Digit codes

Ntmager · 08-02-2022, 03:43 PM

Quote:

Originally Posted by Navykiller

Are you pulling those codes through MHD or a code reader? They look like generic codes, not BMW 4 Digit codes

I just have a generic code reader that I got them from. Should I purchase the MHD code reader?

Navykiller · 08-02-2022, 03:45 PM

Quote:

Originally Posted by Ntmager

I just have a generic code reader that I got them from. Should I purchase the MHD code reader?

Absolutely. If you are anything, even completely stock, you need a code reader for BMW.

Ntmager · 08-02-2022, 04:15 PM

Quote:

Originally Posted by Navykiller

Absolutely. If you are anything, even completely stock, you need a code reader for BMW.

Just went out and used MHD to view it. Here's what it's saying.

Navykiller · 08-02-2022, 04:26 PM

Clear the codes and see if they come back

Soden82 · 08-02-2022, 04:27 PM

You might need new o2 sensors. If you had a fancy autel scanner you could check o2 sensor voltages to confirm

Ntmager · 08-02-2022, 05:46 PM

Quote:

Originally Posted by Navykiller

Clear the codes and see if they come back

I just reset them and went on a short drive 2/3 came back. I'll update again once I can get some more driving in. Thanks.

dmckmc · 08-02-2022, 08:08 PM

We have to pass emissions in the Missouri county we live in. After much experimenting, I used an O2 sensor 'tuner' to make things ready. The problem I faced was if you tell MHD you have aftermarket down pipes via unchecking the box during programming, the state computer reads this as catalyst and O2 unsupported programming. This failed the car immediately for a 'Comm Fail', regardless of catalyst readiness. I had to tell MHD I had factory cats (check the box) to avoid this unsupported error. The shop recognized I had a tune and said they see the error often on tuned cars. The O2 sensor tuner worked fine and the car was quickly in a 'ready' state and passed inpection.

It's even more difficult to sort out when there are other problems with the car. It can be hard to tell what's causing the problems for not ready.

Ntmager · 08-02-2022, 11:33 PM

Quote:

Originally Posted by Soden82

You might need new o2 sensors. If you had a fancy autel scanner you could check o2 sensor voltages to confirm

Do you think I should do all 4 just to eliminate the problem/possibility of the sensors being bad?

Ntmager · 08-04-2022, 01:03 PM

Quote:

Originally Posted by dmckmc

We have to pass emissions in the Missouri county we live in. After much experimenting, I used an O2 sensor 'tuner' to make things ready. The problem I faced was if you tell MHD you have aftermarket down pipes via unchecking the box during programming, the state computer reads this as catalyst and O2 unsupported programming. This failed the car immediately for a 'Comm Fail', regardless of catalyst readiness. I had to tell MHD I had factory cats (check the box) to avoid this unsupported error. The shop recognized I had a tune and said they see the error often on tuned cars. The O2 sensor tuner worked fine and the car was quickly in a 'ready' state and passed inpection.

It's even more difficult to sort out when there are other problems with the car. It can be hard to tell what's causing the problems for not ready.

Did you use a DP fix and an "02 tuner"? Or do you actually have cats?

Ntmager · 08-04-2022, 01:04 PM

Quote:

Originally Posted by Navykiller

Clear the codes and see if they come back

I reset the codes again and they went away. Going to try the DP fix and hopefully everything works out.

Soden82 · 08-04-2022, 02:55 PM

Quote:

Originally Posted by Ntmager

Quote:

Originally Posted by Soden82

You might need new o2 sensors. If you had a fancy autel scanner you could check o2 sensor voltages to confirm

Do you think I should do all 4 just to eliminate the problem/possibility of the sensors being bad?

The rear most two are for the emissions system so those I'd replace first (they're also the cheapest and easiest to access)

dmckmc · 08-04-2022, 03:16 PM

Quote:

Originally Posted by Ntmager

Did you use a DP fix and an "02 tuner"? Or do you actually have cats?

DP Fix = O2 tuner, same device. Sorry if I mixed up the terminology. My car has cat-less down pipes (no cats). I still had to tell MHD the car had OEM exhaust. Otherwise MHD would tune them out and the State inspection computer would see this as 'unsupported-programming error' and fail the car immediately.

Made my own based on a forum post at ***********: https://drive.google.com/file/d/1-d4...ew?usp=sharing

The instructions are for inserting it into a JB4 harness but it can be easily adapted to inserting directly into the DME harness.

Ntmager · 08-04-2022, 05:32 PM

Quote:

Originally Posted by dmckmc

DP Fix = O2 tuner, same device. Sorry if I mixed up the terminology. My car has cat-less down pipes (no cats). I still had to tell MHD the car had OEM exhaust. Otherwise MHD would tune them out and the State inspection computer would see this as 'unsupported-programming error' and fail the car immediately.

Made my own based on a forum post at ***********: https://drive.google.com/file/d/1-d4...ew?usp=sharing

The instructions are for inserting it into a JB4 harness but it can be easily adapted to inserting directly into the DME harness.

I purchased one of these and should have it shortly. I'm pretty much in the same scenario as you then. Hopefully everything works!

08-02-2022, 12:22 PM	#1
Ntmager New Member 0 Rep 13 Posts Drives: BMW E90 335I Join Date: Aug 2022 Location: NY iTrader: (0)	E90 335i Catless NY Emissions Hi I just bought a 335i from another state and it's catless. Is there any way for me to pass a NY state inspection without changing the exhaust setup? I bought the car knowing that most likely I will have to go back to stock, but I'm just fishing for ideas. Thanks
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08-02-2022, 01:26 PM	#2
Navykiller Private First Class 65 Rep 120 Posts Drives: 2011 E92 335is Stick Join Date: Aug 2017 Location: Taylor Ham iTrader: (0)	Find out how many monitors can be "not ready" in NJ you can have 1 i believe without failing, this case would be the Cats. You WILL need either a jb4 BEF or a MHD Tune to have the CEL light off, Allegedly, since any of this is illegal so Im speaking hypothetically in theory. __________________ 2011 335is 6spd - White with Black Base : 5in VRSF IC / BMS CP Raceport BOV / Arm DP / RB Inlets / JB4 w/ MHD BEF Race / Meth cm10 / Modified CDV / BMS DCI / Stage 2 LPFP / Spec 3+ Clutch / - RB 2+ Turbos SHE LIVES \ Ew @ Comic Sans 1992 NA6 Smurf miata - pretty much dead / parting out 2005 Ex 250 ninja
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08-02-2022, 03:03 PM	#4
Navykiller Private First Class 65 Rep 120 Posts Drives: 2011 E92 335is Stick Join Date: Aug 2017 Location: Taylor Ham iTrader: (0)	what codes is it throwing? It may be something not related __________________ 2011 335is 6spd - White with Black Base : 5in VRSF IC / BMS CP Raceport BOV / Arm DP / RB Inlets / JB4 w/ MHD BEF Race / Meth cm10 / Modified CDV / BMS DCI / Stage 2 LPFP / Spec 3+ Clutch / - RB 2+ Turbos SHE LIVES \ Ew @ Comic Sans 1992 NA6 Smurf miata - pretty much dead / parting out 2005 Ex 250 ninja
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08-02-2022, 04:26 PM	#10
Navykiller Private First Class 65 Rep 120 Posts Drives: 2011 E92 335is Stick Join Date: Aug 2017 Location: Taylor Ham iTrader: (0)	Clear the codes and see if they come back __________________ 2011 335is 6spd - White with Black Base : 5in VRSF IC / BMS CP Raceport BOV / Arm DP / RB Inlets / JB4 w/ MHD BEF Race / Meth cm10 / Modified CDV / BMS DCI / Stage 2 LPFP / Spec 3+ Clutch / - RB 2+ Turbos SHE LIVES \ Ew @ Comic Sans 1992 NA6 Smurf miata - pretty much dead / parting out 2005 Ex 250 ninja
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08-02-2022, 04:27 PM	#11
Soden82 Major 495 Rep 1,227 Posts Drives: 2011 BMW M3 Join Date: Jun 2017 Location: Boston iTrader: (1) Garage List 2011 BMW M3 [0.00]	You might need new o2 sensors. If you had a fancy autel scanner you could check o2 sensor voltages to confirm __________________ 2009 BMW 335i 6MT big single (eventually) For now... MHD tuned VRSF Race IC DCI ATM exhaust
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08-02-2022, 08:08 PM	#13
dmckmc Private 59 Rep 95 Posts Drives: BMW 535i E60 (2008) Join Date: Dec 2021 Location: USA iTrader: (0)	We have to pass emissions in the Missouri county we live in. After much experimenting, I used an O2 sensor 'tuner' to make things ready. The problem I faced was if you tell MHD you have aftermarket down pipes via unchecking the box during programming, the state computer reads this as catalyst and O2 unsupported programming. This failed the car immediately for a 'Comm Fail', regardless of catalyst readiness. I had to tell MHD I had factory cats (check the box) to avoid this unsupported error. The shop recognized I had a tune and said they see the error often on tuned cars. The O2 sensor tuner worked fine and the car was quickly in a 'ready' state and passed inpection. It's even more difficult to sort out when there are other problems with the car. It can be hard to tell what's causing the problems for not ready.
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