Failed Inspection test - catalyst not ready
Thread Starter
Pro
Joined: May 2007
Posts: 609
Likes: 8
From: Round Rock TX
Failed Inspection test - catalyst not ready
Hey Guys,
I have been battling problem for the sometime now. I have taken my car in to get inspected several times to different places and each time I fail my state inspection. Each time my report comes back with the Catalyst and Evap systems as not ready.
I found on the forum GM's "drive" cycle instructions and ran through those. Still no luck.
Someone said to take it to a dealer and have them do a reset on the computer. I have a custom dyno tune on the car and the programmer told me this would wipe out his tune. Now before you start think it is the tune. I have had the tune on the car for over 3yrs. This would be the 4th inspection I had with the tune on it. So me and the programmer who is Cory at Henderson Performance do not think it is the tune.
So does anyone have any suggestions? I thought about disconnecting the battery and let the car set for a hour so that everything will reset on the car. Does that sound like a good idea?
I really need your help I am 2x months out of inspection and with school starting on Tuesday there will be cops everywhere.
Thanks
I have been battling problem for the sometime now. I have taken my car in to get inspected several times to different places and each time I fail my state inspection. Each time my report comes back with the Catalyst and Evap systems as not ready.
I found on the forum GM's "drive" cycle instructions and ran through those. Still no luck.
Someone said to take it to a dealer and have them do a reset on the computer. I have a custom dyno tune on the car and the programmer told me this would wipe out his tune. Now before you start think it is the tune. I have had the tune on the car for over 3yrs. This would be the 4th inspection I had with the tune on it. So me and the programmer who is Cory at Henderson Performance do not think it is the tune.
So does anyone have any suggestions? I thought about disconnecting the battery and let the car set for a hour so that everything will reset on the car. Does that sound like a good idea?
I really need your help I am 2x months out of inspection and with school starting on Tuesday there will be cops everywhere.
Thanks
Burning Brakes
Joined: Jul 2004
Posts: 1,169
Likes: 71
From: MA
That doesn't sound right. You might want to post this in the Scan & Tune area. For some reason your computer isn't resetting after going through the ready cycle. I would suggest calling your tuner for suggestions.
I would check your battery, grounds and connections to the PCM. I am not an expert but if your PCM senses low or no voltage it will enter reset mode and you will get the "not ready" codes. I would disconnect the battery and try that. I think that you can read the codes from your dash readout so you can check for these codes before you go for an inspection. You may also have a problem with your PCM.
I hope this helps.
I would check your battery, grounds and connections to the PCM. I am not an expert but if your PCM senses low or no voltage it will enter reset mode and you will get the "not ready" codes. I would disconnect the battery and try that. I think that you can read the codes from your dash readout so you can check for these codes before you go for an inspection. You may also have a problem with your PCM.
I hope this helps.
Team Owner
Joined: Nov 2001
Posts: 45,000
Likes: 585
That doesn't sound right. You might want to post this in the Scan & Tune area. For some reason your computer isn't resetting after going through the ready cycle. I would suggest calling your tuner for suggestions.
I would check your battery, grounds and connections to the PCM. I am not an expert but if your PCM senses low or no voltage it will enter reset mode and you will get the "not ready" codes. I would disconnect the battery and try that. I think that you can read the codes from your dash readout so you can check for these codes before you go for an inspection. You may also have a problem with your PCM.
I hope this helps.
I would check your battery, grounds and connections to the PCM. I am not an expert but if your PCM senses low or no voltage it will enter reset mode and you will get the "not ready" codes. I would disconnect the battery and try that. I think that you can read the codes from your dash readout so you can check for these codes before you go for an inspection. You may also have a problem with your PCM.
I hope this helps.
Just to be sure you know...if you disconnect the battery you will need to do the drive cycle again. Also, the items on the drive cycle eventually all get covered in normal driving if you don't want to have to go through a specific routine and timeline.
Race Director
Joined: Mar 2007
Posts: 18,308
Likes: 21
From: Marlton. Increasing performance one speeding ticket at a time! NJ
If the catalyst system is showing up as "not ready", then it's probably the rear O2 sensors aren't reporting correctly, or they are reporting correctly and the cats are going.
Either way, since you have a tuner who is willing to work with you, just shut the codes off. Not a big deal at all.
Either way, since you have a tuner who is willing to work with you, just shut the codes off. Not a big deal at all.
Racer
Joined: Jun 2010
Posts: 415
Likes: 16
From: Toronto
Melting Slicks
Joined: Oct 2007
Posts: 2,798
Likes: 8
From: It's true money can't buy happiness, but it is more comfortable crying in a Corvette than on a bicyc
St. Jude Donor '13
When I lived in Texas they only emission tested in the major metro areas. How about a drive to podunk county that doesn't test? Back in the day you could just buy the sticker and slap it on the windshield yourself but the trick was finding the right shop.
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Le Mans Master
Joined: Nov 2005
Posts: 6,993
Likes: 25
If the catalyst system is showing up as "not ready", then it's probably the rear O2 sensors aren't reporting correctly, or they are reporting correctly and the cats are going.
Either way, since you have a tuner who is willing to work with you, just shut the codes off. Not a big deal at all.
Either way, since you have a tuner who is willing to work with you, just shut the codes off. Not a big deal at all.
The I/M monitors test things like Catalyst, EGR (where applicable), Evaporative Emissions,... Some states will allow you to fail 1 I/M test some will not.
Here in IL, the OBD test goes right to the State-no way to get around it.
Thread Starter
Pro
Joined: May 2007
Posts: 609
Likes: 8
From: Round Rock TX
These are NOT codes, they are I/M monitor tests-they can not be tuned out. If it's like IL-the just plug into the OBD port. I have other OBD readers, I plug in all my vehicles before I go to test-I know 100% that all the I/M monitors pass before I go in.
The I/M monitors test things like Catalyst, EGR (where applicable), Evaporative Emissions,... Some states will allow you to fail 1 I/M test some will not.
Here in IL, the OBD test goes right to the State-no way to get around it.
The I/M monitors test things like Catalyst, EGR (where applicable), Evaporative Emissions,... Some states will allow you to fail 1 I/M test some will not.
Here in IL, the OBD test goes right to the State-no way to get around it.
Thread Starter
Pro
Joined: May 2007
Posts: 609
Likes: 8
From: Round Rock TX
If the catalyst system is showing up as "not ready", then it's probably the rear O2 sensors aren't reporting correctly, or they are reporting correctly and the cats are going.
Either way, since you have a tuner who is willing to work with you, just shut the codes off. Not a big deal at all.
Either way, since you have a tuner who is willing to work with you, just shut the codes off. Not a big deal at all.
Team Owner
Joined: Nov 2001
Posts: 45,000
Likes: 585
If I remember correctly Texas allows 1 fail but cannot pass a "not ready". I had some repairs done and the shop disconnected the battery. It caused me to fail my inspection. I had to drive for about a week with my fingers crossed until I could get the drive cycle completed.
Le Mans Master
Joined: Nov 2009
Posts: 6,119
Likes: 156
From: Huntington tx
OMG!!!! I'm in Angelina County and we don't have that silliness! Tires-Check! Lights working-Check! Wipers-Check! Brakes-Check! $14.50-Check! Here's your Inspection sticker Have a nice day!
Last edited by sfc rick; Aug 21, 2011 at 03:34 PM.
Thread Starter
Pro
Joined: May 2007
Posts: 609
Likes: 8
From: Round Rock TX
I wish I could take it to a different county however I live just north of Austin (Williamson County) and we are required to have that whole stupid emission test done. If I try to go to a different county they are required to run the same test that Williamson County would run. SO it is pointless to go some where else.
I changed out the o2 sensors downstream today and I bought a OBD2 scanner tool so I can monitor the I/M test status. I do not have any DTC codes current or history on the car. So now I will drive it and see what comes back.
I am thinking my next steps are going to be to replace the catalyst's but that does not help we with the Evap system.
Does anyone know what the EVAP system is and what makes it up?
I changed out the o2 sensors downstream today and I bought a OBD2 scanner tool so I can monitor the I/M test status. I do not have any DTC codes current or history on the car. So now I will drive it and see what comes back.
I am thinking my next steps are going to be to replace the catalyst's but that does not help we with the Evap system.
Does anyone know what the EVAP system is and what makes it up?
Burning Brakes
Joined: Aug 2007
Posts: 792
Likes: 16
From: Austin Tx
In Texas you can have 1 moniter " Not Ready " and pass but none can be " Failed ". Any failure will turn on a check engine light.
Burning Brakes
Joined: Aug 2007
Posts: 792
Likes: 16
From: Austin Tx
I wish I could take it to a different county however I live just north of Austin (Williamson County) and we are required to have that whole stupid emission test done. If I try to go to a different county they are required to run the same test that Williamson County would run. SO it is pointless to go some where else.
I changed out the o2 sensors downstream today and I bought a OBD2 scanner tool so I can monitor the I/M test status. I do not have any DTC codes current or history on the car. So now I will drive it and see what comes back.
I am thinking my next steps are going to be to replace the catalyst's but that does not help we with the Evap system.
Does anyone know what the EVAP system is and what makes it up?
I changed out the o2 sensors downstream today and I bought a OBD2 scanner tool so I can monitor the I/M test status. I do not have any DTC codes current or history on the car. So now I will drive it and see what comes back.
I am thinking my next steps are going to be to replace the catalyst's but that does not help we with the Evap system.
Does anyone know what the EVAP system is and what makes it up?
If you get down to only 1 " Not Ready" you will pass in Williamson county.
Le Mans Master
Joined: Nov 2005
Posts: 6,993
Likes: 25
I wish I could take it to a different county however I live just north of Austin (Williamson County) and we are required to have that whole stupid emission test done. If I try to go to a different county they are required to run the same test that Williamson County would run. SO it is pointless to go some where else.
I changed out the o2 sensors downstream today and I bought a OBD2 scanner tool so I can monitor the I/M test status. I do not have any DTC codes current or history on the car. So now I will drive it and see what comes back.
I am thinking my next steps are going to be to replace the catalyst's but that does not help we with the Evap system.
Does anyone know what the EVAP system is and what makes it up?
I changed out the o2 sensors downstream today and I bought a OBD2 scanner tool so I can monitor the I/M test status. I do not have any DTC codes current or history on the car. So now I will drive it and see what comes back.
I am thinking my next steps are going to be to replace the catalyst's but that does not help we with the Evap system.
Does anyone know what the EVAP system is and what makes it up?
Thread Starter
Pro
Joined: May 2007
Posts: 609
Likes: 8
From: Round Rock TX
I found the line between the Evap solenoid and the TB was not all the in. So I am hoping that fixes the Evap "not ready" but I have to drive around for a while to burn off some gas. What I have read is that the Evap test will not run until the gas tank is less then half full.
Racer
Joined: Apr 2011
Posts: 415
Likes: 1
From: british columbia
The whole crap is nothing but a money grab, costs $45. here every year!!
