Stock downpipes needed, 2013 SHO

[Courier6]

I am having trouble getting the readiness for inspection reset for emissions testing here in Tennessee. I am throwing a code P0420 when I flash back to stock and might have to return to stock down pipes in order to pass the emissions test.

[DJE624]

That's a bummer.  I'll have to remember to save my stock pipes if I ever do that mod.  They don't test by me now but you never know! 

[EcoPowerParts]

I have a set of stock cat downpipes but my cat to mid-pipe is modified with an H pipe to put a cutout on. I'd sell you them for $200 + shipping if you wanted them, they have value to somebody who wants to do a cutout on stock downpipes.

Just FYI, the PPE pipes are the only catted downpipes to pass emissions regularly. I'd buy anyone's catless (whoever is cheapest) but go PPE for no P0420 codes.

[mhenne4]

Cant the tune turn off the code?

[EcoPowerParts]

Cant the tune turn off the code?

Alot of states are moving to readiness checks, if you turn off the rear O2 and the code then you fail the readiness check and fail emissions. It's becoming more and more important to have cat'd downpipes that pass readiness checks. Just sticking a cheap cat on a set of pipes might pass a visual but won't pass these readiness type emissions tests.

[SHOdded]

Need to feed dummy data to the OBD at da flip of da switch?

[Scott13SHO]

Cant the tune turn off the code?

The issue is this...every time you flash or clear the code, the computer goes to a zero mileage state...or something along those lines, not sure of the correct terminology to use.

For example, my Fiancee's Escape was tripping the Check engine light, I thought it was the O2 senors, but it winded up that it was part of the capless fuel system, a valve failed and was sucking fumes into something it shouldn't have been. Anyways I was clearing the code for her and she went to inspection (I live in MD, they use Cali emissions standards IIRC) they hooked up to the OBD port and asked if she had work done to the car and asked to her come back after in a few weeks because it didn't have enough mileage on it to do the proper testing.

[SHOdded]

So you'd need to crack the mileage setting also.  No such requirement for vehicles with tailpipe testing.  I'd think it is the relearn period after reset, no?  If we can figure out the readiness monitors involved, should work.

[EcoPowerParts]

So you'd need to crack the mileage setting also.  No such requirement for vehicles with tailpipe testing.  I'd think it is the relearn period after reset, no?  If we can figure out the readiness monitors involved, should work.

No, that won't work.
You either need to put in a downpipe that has cats that the rear O2 will actually be able to read from and not say that the cats are bad or some type of super fancy O2 simulation device to plug into the rear O2's. I've heard rumors of these being out there in the wild and allowing anything to pass emissions but they're highly illegal.

[SHOdded]

I've heard rumors of these being out there in the wild and allowing anything to pass emissions but they're highly illegal.

Understood.  Personally, I support max clean air, having had to be in traffic countless times behind gunk and smog spewing vehicles.  This is a theoretical venture for me, to get an understanding of how the OBD sensors/data/emissions testing interplay.

[twnscrw13]

Hmmm.. I got the catted downpipes from LMS.  Have folks been having issues with these passing emissions?

[mval]

Have received  PPE's down pipes from 4DR as in St. Louis emissions test required, hopefully will be installed in next week or 2, depends on my guy & his schedule. Then will give an update, real test in next Jun.
MikeV

[Courier6]

You should not have an issue, once the car achieved "readiness" I breezed through the Tennessee state inspection.