I need to pass inspection in the next few weeks and my car just began throwing TGV codes (RH stuck open). Rather than fixing the problem right away and possibly messing up another system that would cause me to fail inspection while I have the intake manifold off I have ordered a Tactrix cable and decided to use enginuity to eliminate the DTCs. After passing inspection I will be doing the TGV delete as well as other engine mods.

So, my question is that if I use enginuity to eliminate the codes will it always show up as system not ready when the codes are pulled (causing me to fail the inspection) or will it pass the OBD-II inspection?

I've read a lot of threads asking how to eliminate codes and they only go so far as saying that enginuity or (insert other OS ecu editing software, AP, etc) will clear the codes and turn off the CEL but I haven't seen too many comments on whether or not it stays in perpetual "system not ready" status once the codes are eliminated.

If that won't allow me to pass emissions can I use enginuity's Force pass readiness function to pass emissions? I know people don't condone this but This car is my DD (and stock... for now) and I need it to pass the inspection before I go back to college.

If that won't allow me to pass emissions can I use enginuity's Force pass readiness function to pass emissions? I know people don't condone this...
This will work, but you use at your own risk, as with any changes you make with Enginuity/Ecuflash. Most (all?) modifications to the factory ECU that impact emissions are, I imagine, illegal, including disabling CELs. Removing cats and doing a TGV delete, I imagine, is also illegal. So, not using the force pass fix does not mean you are in compliance with the law.

Disabling a CEL will not impact any readiness monitors. I can't remember if the TGV-related failures will impact any of the readiness monitors, though. I don't think it does. The latest ecu defs do have a new TGV fix which bypasses the TGV checks completely which is different than a standard CEL disable.

Thanks for the info!

I should clarify that when I said "disabling a CEL will not impact readiness monitors", I mean that disabling the CEL will not help you pass any of the readiness monitors.

I should clarify that when I said "disabling a CEL will not impact readiness monitors", I mean that disabling the CEL will not help you pass any of the readiness monitors.

Are you saying that using these:
http://i194.photobucket.com/albums/z266/nismonic/misc/enginuity.jpg

Will cause the ECU to always be in a non-ready state... I.e. the emissions readiness monitors will never be ready? Or, are you saying that the TGV sensors have no impact on whether or not the system is ready... it's only the fact that they are throwing a code that will cause me to fail.

Sorry if this is a really simple point that I'm missing... I really haven't been looking into OS ECU tuning for more than a few days.

Are you saying that using these:

Will cause the ECU to always be in a non-ready state... I.e. the emissions readiness monitors will never be ready? Or, are you saying that the TGV sensors have no impact on whether or not the system is ready... it's only the fact that they are throwing a code that will cause me to fail.

Sorry if this is a really simple point that I'm missing... I really haven't been looking into OS ECU tuning for more than a few days.
I'm saying that disabling CELs (through the Enginuity/Ecuflash DTC disable list) does nothing, either way, for readiness monitors -> doesn't help, doesn't hurt. The TGV fix you've shown may impact the readiness monitors (in that it may help), if TGVs impact the readiness tests for this ECU (I don't think they do IIRC).

OK.. I think I see it now. I just went out and pulled the codes from my car with an OBD-II scanner. It passed all the readiness tests, once with the CEL light off (was off when I started the car this time) but throwing codes 1088,1092, and 1096 and once with the CEL on (came on while driving) and throwing the same codes.

So if it passes the readiness tests with faulty TGV hardware (and throwing the associated codes) it should pass them with the codes suppressed in the ECU.

If I had the Tactrix cable in my hand I would just go try it out... but it's still in the mail, so I'm just trying to understand it before I mess with the ECU.

Thanks again for your help Tea cups!

You want to enable the fixes under the "emissions" tab (the ones you have open in the screen shot above).

If you disable the CEL's in the "Diagnostic Trouble Codes" section your readiness monitors will never become ready (even if you have the "fix" enabled in the emissions section).

You want to enable the fixes under the "emissions" tab (the ones you have open in the screen shot above).

If you disable the CEL's in the "Diagnostic Trouble Codes" section your readiness monitors will never become ready (even if you have the "fix" enabled in the emissions section).
That's not true -> disabling CELs will have no effect on the readiness monitors either way (won't help, won't hurt). The "force pass readiness monitor" will force a pass of all monitors regardless immediately. If you don't want to force a pass and your issue is with the catalyst test, then you can enable the catalyst readiness monitor fixes. This will still require the proper drive cycle to be completed, though.

why don't i have an emissions tab for my 06 :-(

That's not true -> disabling CELs will have no effect on the readiness monitors either way (won't help, won't hurt). The "force pass readiness monitor" will force a pass of all monitors regardless immediately. If you don't want to force a pass and your issue is with the catalyst test, then you can enable the catalyst readiness monitor fixes. This will still require the proper drive cycle to be completed, though.

The version of enginuity that I have doesn't have a force pass readiness monitor setting. And disabling the dtc will not allow it to become ready. I got an incomplete when I first went for my emissions test because of this very issue. As soon as I re-enabled it my readiness monitors became ready (after a drive cycle). I suppose it could have been something else but the only thing I changed between tests was enabling the DTC for cat efficiency so I kind of doubt that. And I hadn't reset the ecu for several weeks before the incomplete.

The version of enginuity that I have doesn't have a force pass readiness monitor setting. And disabling the dtc will not allow it to become ready. I got an incomplete when I first went for my emissions test because of this very issue. As soon as I re-enabled it my readiness monitors became ready (after a drive cycle). I suppose it could have been something else but the only thing I changed between tests was enabling the DTC for cat efficiency so I kind of doubt that. And I hadn't reset the ecu for several weeks before the incomplete.
That's hardly conclusive and it is not correct. I'm talking about the disabling of individual DTCs (for example, P0420), not the cat efficiency fixes under the emissions category. Enabling those fixes (even without the force pass fix) DO have an impact on the readiness tests. But disabling/enabling the P0420 DTC doesn't impact the readiness tests either way.

The reason you don't have the force pass fix in your "version" of Enginuity is because you didn't update your ECU definitions, which are released independently of the software (see the faq in this forum).

And this is why you live in MN?

That's hardly conclusive and it is not correct. I'm talking about the disabling of individual DTCs (for example, P0420), not the cat efficiency fixes under the emissions category. Enabling those fixes (even without the force pass fix) DO have an impact on the readiness tests. But disabling/enabling the P0420 DTC doesn't impact the readiness tests either way.


So you are saying that if I disable the DTC(s) for cat efficiency the readiness monitors should still come up as ready (after enough drive cycles)? Next time I flash the car I will try it out. I already passed emissions this year so I don't need the readiness checks up for another 2 years :banana:.



The reason you don't have the force pass fix in your "version" of Enginuity is because you didn't update your ECU definitions, which are released independently of the software (see the faq in this forum).

Figured it was something like that, its been a while since I updated my defs. Last I knew it was just being talked about. Glad to see it has been added.

So you are saying that if I disable the DTC(s) for cat efficiency the readiness monitors should still come up as ready (after enough drive cycles)?
No, disabling the DTCs does nothing in relation to the readiness tests. That is, it does not hurt, it does not help, whether they are disabled or enabled. The only thing that impacts the readiness tests are the cat efficiency fixes (whose description was incorrect under previous ECU defs) under the emissions tab and also the force readiness fix.

i haven't looked yet but can i pull trouble codes with enginuity? i have a cel and haven't had time to go have autozone pull it.

Update: I flashed my ecu with the A4SGE01C map with the TGV Fixes and all the TGV DTCs disabled and after driving ~100 miles all the readiness tests were complete and no codes showed up.

subscribed

I've passed emissions with deleted TGV codes using enginuity (which is obviously now romraider), and I live in CA

EDIT: holy crap, I did not realize how old this thread was