Emissions test question
Thread Starter
Intermediate
Joined: Aug 2006
Posts: 46
Likes: 0
From: Oak Creek WI
Emissions test question
I have an '04 Z06 w/headers and hi flow cats. My car regularly throws p0420 and p0430 codes. I haven't driven the car much this year and when I took it in for emisions the catalyst and evaporative systems weren't ready to be tested and I am only allowed 1 system to be "not ready". On the way home SES came on again and I reset the codes. My question is, when I reset the p0420 and 0430 codes does that make all the systems not ready again or just the catalyst system? If all the systems reset I don't know how I can get it through the drive cycle so it can be tested without throwing codes again.
Le Mans Master
Joined: Nov 2005
Posts: 6,993
Likes: 25
As soon as you reset you will most likely fail till a complete drive cycle is complete. AND, chances are you'll throw another code before that happens. And yes, all the I/M's will reset when you clear the codes. In IL, you can fail/Not Ready 1 I/M-you should check online with your State DMV.
Last edited by dougbfresh; Jul 7, 2009 at 08:47 PM.
Race Director
Joined: Oct 2002
Posts: 16,477
Likes: 26
From: Gone
CI 6-7-8-9-10 Veteran
St. Jude Donor '03
I have an '04 Z06 w/headers and hi flow cats. My car regularly throws p0420 and p0430 codes. I haven't driven the car much this year and when I took it in for emisions the catalyst and evaporative systems weren't ready to be tested and I am only allowed 1 system to be "not ready". On the way home SES came on again and I reset the codes. My question is, when I reset the p0420 and 0430 codes does that make all the systems not ready again or just the catalyst system? If all the systems reset I don't know how I can get it through the drive cycle so it can be tested without throwing codes again.
No, I may not know you, but I just gave you a little tip as to the easiest way to never have to worry about testing in WI again.
If you're insistent on going thru emissions, you may need the help of a tuner to get it to pass.
Last edited by Y2Kvert4me; Jul 7, 2009 at 08:54 PM.
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Tuners can disable some DTC and take the function out of the monitor chain so that they do not set or set a flag. See your local tuner or purchase your own tuning software.
BC
BC
