c6 Houston

RESULTS FROM TEXAS VEHICLE INSPECTION REPORT NOT GOOD

Okay, I have LG headers with High Flow cats.
I was getting a P0430 code = Catalyst System Efficiency Below threshold (bank 2).

I reset the computer with a code reader/eraser.

Drove the car for about 40 miles with not codes or service light.. So I pulled into inspection and it “FAILED”. I have HP Tuner and could turn this P0430 off but I don’t think this will solve my problem as far as getting the car to “PASS”. Does any one know how many miles I you have to drive or how many time the car has to be started to run throw the cycles? Or what should I do.

'06 Quicksilver Z06

You did know that this could be an issue before you installed the headers, right???

Let us know when it finally does pass emissions. But I suspect that you are right, in that if you turn those codes off, it still might not pass.

not08crmanymore

Well I don't know if this will help but in NY when a code/CEL comes on the car must be driven fast and slow and fast again for 15-30 minutes then left to cool off some.We had a MUSTANG here that had a CAT issue(it was set up with headers,tune etc) We had to put a new "CAT" IN and remove the tune (DIABLO).

Nicodemus

Set the O2 sensor codes to "no error reported" and leave the codes enabled. You should pass fine, I did in maryland.

k0bun

Did they tell you why you failed? Was it because of the codes or because of the headers/cats?

GMautotech

All of the emission readiness tests probably didn't finish running yet. It could take a week for all the tests to completely run depending on driving style.

johnodrake

This may help: http://www.txdps.state.tx.us/vi/Misc...ists092005.pdf

Cobra4B

I had the same issue years back when I put my headers in and didn't bother with a dyno-tune. The car senses the higher flow cats as an error and throws the cat ineffieciency code and you reset it. I did this for a long time as the code would only trip ever few weeks. In a C5 you can pull up your codes and delete them in the DIC (no seperate code reader needed). The trick is to go ahead and get the car tuned and have the rear 02s turned off or have the codes turned off. After having that done I passed inspection w/o issue.

Everytime you clear the code you undo the "ready" settings of various systems on the car. When the tech plugs in the OBD-II scanner it first checks for system readiness. If you have 2 or more not readys then you cannot get tested and fail. The car must go through a rather involved drive cycle of various conditions to re-set the ready status.

Same thing happened to my father's stock '04 Z16 Z06 when he didn't drive it for a few months... the car showed as not ready. They told him to drive it for a week and come back. It eventually passed.

So... go get a proper tune.

C6400hp

Brett Hunter

Here is a link to the drive cycle required for ready status.

I/M readiness test

HurtSoGood

Problems with emissions or inspections? Move to Florida!

runutzzzzz

c6 Houston

I have HP Tuners Pro and not sure how to do this?

Cobra4B

^ If you have HPTuners, then you can go in and turn off the rear 02s

'06 Quicksilver Z06

Turning off his rear 02s might not be the answer either.

If his rear 02s are nonfunctional or turned off, they will show a "not ready" status when the folks at the inspection station plug into his OBD port and test his emissions system for readiness. It would be the same as if you had a bad 02 sensor.

In some states, thats enough to fail emissions.

glenB

Pls don't

Zig

a little while back there was some good discussions on the forum about headers, cats, and codes.

or was it 'failed based upon the visual inspection', it's a 'federal fail' for messing with the 'cats'. simply moving them from their 'original' location will fail the car.







btw: the 'issue' can be resolved without 'turning off any codes or disabling anything.' even though a 'good tune' is always a good idea (caveat - gm can tell if it's been 'tuned' and can deny warantee as a result) a tune is not required to resolve the issue.

wallyj

In Texas, like some (maybe all?) other states, there is no sniffer test for OBDII cars. They just read the PCM. I'm no expert (by a long shot), but I believe if he turns off the code it will pass.

I have a 99 T/A that I bought with long tubes and no cats. Passed 2 years in a row no problems at two different inspection stations. Obviously the previous owner had disabled several codes. My intention was to put cats back on, but now I'm selling the car.

They are getting picky here about resetting (as opposed to removing) a code and then going for inspection. I did not know this last year when a friend of mine got a code on her Saturn about eveporative emissions. She probably needed a new gas cap. I reset it and she drove a couple days and it did not come back. She went for inspection and they told her to come back in a few more days because someone had recently reset trouble codes. That surprised me.

haljensen

My '05 passed 2 Texas inpections with DynoMaxx long tube headers with high flow cats thanks to Chuck@ Corvetes of Westchester's mail order tune. No codes on the OBD2 and the visual was a "Don't ask, don't tell".

VET4LES

In California there is a waiting period after codes have been reset. I don't know what it is but it's a least a few days.