Emissions question. - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Token11b · 07-28-2016, 12:57 AM

So hypothetically if you were running a catless header but you still had your secondary cat and you had it tuned to remove the CEL would you still be able to pass emissions testing here in Arizona. Just curious

NickDC88 · 07-28-2016, 01:53 AM

I'm not 100% sure, but I believe it will pass.

djwishbone · 07-28-2016, 02:29 AM

I was just wondering that myself.

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swarb · 07-28-2016, 02:50 AM

For California: The o2 needs to be on as they test if it is working. Not sure if tune turns it off or just removes the cel from it.

renfield90 · 07-28-2016, 03:10 AM

Depends on the tune. People have run through emissions in other states on the OFT off the shelf tunes and passed. Those tunes just disable the DTC from being thrown, but still allow the system to report as ready.

Other tunes, I don't know, but are likely similar.

You should be able to check with a scanner tool to determine if the system reports as ready or not. There is a thread floating around somewhere with specifics.

renfield90 · 07-28-2016, 03:24 AM

Some light reading:

http://www.ft86club.com/forums/showthread.php?t=34704

http://www.ft86club.com/forums/showthread.php?t=93412

klear · 08-19-2016, 05:44 PM

Yeah no problem, my fully catless 207 swapped bugeye doesn't even get a second look. It is only OBD2 check, no CEL you're good.

Summerwolf · 08-19-2016, 09:09 PM

If it is anything like my last car, no cel and you will pass! Arizona was just like Illinois

renfield90 · 08-20-2016, 06:02 PM

Strictly speaking it is more complicated than just "no CEL," to pass you need "no CEL and the system reports as ready."

A system that has recently been reset, for example, won't have enough drive cycles and will report as "not ready." Several CEL codes (like P0420) will not show when the system reports as "not ready" so the MVD considers it a fail since it might hide a CEL.

You can use Torque Pro to determine if the system reports as ready: [ame="https://www.youtube.com/watch?v=GPMwr2730JA"]Torque OBD2 - Emission Monitors - YouTube[/ame]

Wyattkb · 08-21-2016, 02:54 AM

System reports ready with OFT stage 2 catless tune

Scootertribe · 06-28-2017, 02:29 PM

Any updates in this arena? I was curious if anything has changed in the last year regarding this situation.

Token11b · 06-28-2017, 11:52 PM

Well if you'd like an update on my end, I don't know yet haven't had to emission my car yet. Probably won't happen til next year.

07-28-2016, 12:57 AM	#1
Token11b Senior Member Join Date: Sep 2015 Drives: 2013 Scion FR-S Location: Goodyear,Az Posts: 146 Thanks: 4 Thanked 57 Times in 38 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	Emissions question. So hypothetically if you were running a catless header but you still had your secondary cat and you had it tuned to remove the CEL would you still be able to pass emissions testing here in Arizona. Just curious

06-28-2017, 11:52 PM	#12
Token11b Senior Member Join Date: Sep 2015 Drives: 2013 Scion FR-S Location: Goodyear,Az Posts: 146 Thanks: 4 Thanked 57 Times in 38 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	Well if you'd like an update on my end, I don't know yet haven't had to emission my car yet. Probably won't happen til next year. __________________ 2013 Scion FRS Firestorm- Current mods: Gruppe-S UEL Headers w/overpipe, Perrin intake tube w/drop in filter Perrin 3" catback, OFT stage 2 turn

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07-28-2016, 02:29 AM	#3
djwishbone Last Starfighter Join Date: Jul 2016 Drives: 2016 FR-S Series 2.0 Location: Sonoran Desert Posts: 118 Thanks: 36 Thanked 43 Times in 29 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	I was just wondering that myself. Sent from my SM-G930T using Tapatalk

07-28-2016, 02:50 AM	#4
swarb Senior Member Join Date: Sep 2014 Drives: BRZ Location: Los Angeles Posts: 3,052 Thanks: 1,773 Thanked 2,451 Times in 1,271 Posts Mentioned: 79 Post(s) Tagged: 0 Thread(s)	For California: The o2 needs to be on as they test if it is working. Not sure if tune turns it off or just removes the cel from it.

07-28-2016, 03:10 AM	#5
renfield90 The Stig's German cousin Join Date: Mar 2013 Drives: 2013 FR-S Location: Tempe, AZ Posts: 1,071 Thanks: 140 Thanked 519 Times in 345 Posts Mentioned: 8 Post(s) Tagged: 2 Thread(s)	Depends on the tune. People have run through emissions in other states on the OFT off the shelf tunes and passed. Those tunes just disable the DTC from being thrown, but still allow the system to report as ready. Other tunes, I don't know, but are likely similar. You should be able to check with a scanner tool to determine if the system reports as ready or not. There is a thread floating around somewhere with specifics.

07-28-2016, 03:24 AM	#6
renfield90 The Stig's German cousin Join Date: Mar 2013 Drives: 2013 FR-S Location: Tempe, AZ Posts: 1,071 Thanks: 140 Thanked 519 Times in 345 Posts Mentioned: 8 Post(s) Tagged: 2 Thread(s)	Some light reading: http://www.ft86club.com/forums/showthread.php?t=34704 http://www.ft86club.com/forums/showthread.php?t=93412

08-19-2016, 05:44 PM	#7
klear Member Join Date: Feb 2016 Drives: 2002 V7 Bugeye STI/2014 BRZ limited Location: AZ Posts: 28 Thanks: 1 Thanked 5 Times in 5 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Yeah no problem, my fully catless 207 swapped bugeye doesn't even get a second look. It is only OBD2 check, no CEL you're good.

08-19-2016, 09:09 PM	#8
Summerwolf Panda Trueno Join Date: Jan 2015 Drives: No twin now. Location: North Indiana Posts: 3,349 Thanks: 2,113 Thanked 2,409 Times in 1,332 Posts Mentioned: 17 Post(s) Tagged: 2 Thread(s)	If it is anything like my last car, no cel and you will pass! Arizona was just like Illinois

08-20-2016, 06:02 PM	#9
renfield90 The Stig's German cousin Join Date: Mar 2013 Drives: 2013 FR-S Location: Tempe, AZ Posts: 1,071 Thanks: 140 Thanked 519 Times in 345 Posts Mentioned: 8 Post(s) Tagged: 2 Thread(s)	Strictly speaking it is more complicated than just "no CEL," to pass you need "no CEL and the system reports as ready." A system that has recently been reset, for example, won't have enough drive cycles and will report as "not ready." Several CEL codes (like P0420) will not show when the system reports as "not ready" so the MVD considers it a fail since it might hide a CEL. You can use Torque Pro to determine if the system reports as ready: [ame="https://www.youtube.com/watch?v=GPMwr2730JA"]Torque OBD2 - Emission Monitors - YouTube[/ame]

08-21-2016, 02:54 AM	#10
Wyattkb Senior Member Join Date: Oct 2013 Drives: 2014 Whiteout FRS Location: United States Posts: 444 Thanks: 56 Thanked 159 Times in 87 Posts Mentioned: 3 Post(s) Tagged: 1 Thread(s)	System reports ready with OFT stage 2 catless tune

06-28-2017, 02:29 PM	#11
Scootertribe Member Join Date: Feb 2016 Drives: 2013 Scion FR-S - MT Location: Tucson, AZ Posts: 18 Thanks: 15 Thanked 10 Times in 7 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	Any updates in this arena? I was curious if anything has changed in the last year regarding this situation.

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