ODBII Pass or Fail???
ODBII Pass or Fail??? If you remove the EGR, AIR, and REAR O2 sensors from your car and delete the codes through tuning will you pass a OBDII test only. Some members claim there are two PCM parameters "not ready", and your SES codes.
I know it will not throw a SES code if you delete, however will you pass?
I know it will not throw a SES code if you delete, however will you pass?
Well that depend on how the OBDII testing in your state is done. I was told by the guy who performed the test on my car that as long as I dont have a check engine light, you will pass for sure.
Now that being said since they plug into your OBDII, if you disable the code, I still think you will fail cause I believe they are looking at the switching of the Rear O2s directly. If you removed your cats and disabled the code, I believe they can still catch it in the method I just described. But again thats dependant on how deep the testing computer goes into.
In GA they go as far as checking your fuel cap and how it holds and releases pressure.
Dixit
Now that being said since they plug into your OBDII, if you disable the code, I still think you will fail cause I believe they are looking at the switching of the Rear O2s directly. If you removed your cats and disabled the code, I believe they can still catch it in the method I just described. But again thats dependant on how deep the testing computer goes into.
In GA they go as far as checking your fuel cap and how it holds and releases pressure.
Dixit
TECH Addict
Joined: Nov 2001
Posts: 2,593
Likes: 0
From: TEXAS
You have to have it set that the SES light is set to enable, but the error type is set to 'No error Reported' or if using LS1-Edit 'Type X= turned off'.
This will still allow the readiness tests to complete, but it will not display the SES light for any errors. The OBD2 test does not check to see if you pass or fail the tests, just whether or not the test can be completed.
For the record, I have a 98 with no EGR, AIR, CATS, or rear O2's, and I pass every time. It looks like TX and AZ run the same IM240 series of emissions testing.
This will still allow the readiness tests to complete, but it will not display the SES light for any errors. The OBD2 test does not check to see if you pass or fail the tests, just whether or not the test can be completed.
For the record, I have a 98 with no EGR, AIR, CATS, or rear O2's, and I pass every time. It looks like TX and AZ run the same IM240 series of emissions testing.
Last edited by felton316; Aug 5, 2005 at 12:48 AM.
TECH Addict
Joined: Nov 2001
Posts: 2,593
Likes: 0
From: TEXAS
Originally Posted by sdbrown84
Hmmm... What to do then? I want to remove my EGR at least. I dont mind keeping AIR and CATS but, I really want the EGR out.
Get rid of it and set error codes p0401, p0404, and p0405, to 'no error reported' (if using HP Tuners) or 'Type X' (if using LS1-edit). Just make sure that 'SES enable = on'. This way the readiness test can run and complete, but it will never display an error. If you set the 'SES enable = off', then the readiness test will be incomplete.
The OBD II can be made to pass the emission testing if it is plug into the outlet. For the OBD III, they are supose to make it so it will show if you turn off or bypass the codes they are testing and result in a failed testing.
Trending Topics
Originally Posted by Gordy M
The OBD II can be made to pass the emission testing if it is plug into the outlet. For the OBD III, they are supose to make it so it will show if you turn off or bypass the codes they are testing and result in a failed testing.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
Five Reasons the Camaro Was the Most Pivotal Player in the Pony Car Wars 2.0
Brett Foote
10 Reasons the LS7 Is GM's Most Extreme Naturally Aspirated V8 Engine Ever
Verdad Gallardo
TECH Senior Member
Joined: Nov 2001
Posts: 7,036
Likes: 1
From: Lake Zurich, IL
it'll just be a matter of time before someone breaks OBDIII once it's out so long as they use software then anything's possible (now if the tests are hard wired/hardware ... then we're pretty much screwed 
)
so long as they use software then anything's possible (now if the tests are hard wired/hardware ... then we're pretty much screwed ) 
