Failed Emissions: "Not Ready Codes"
Thread Starter
Safety Car
Joined: Nov 1999
Posts: 4,285
Likes: 83
From: S.E. WI.
St. Jude Donor '08-'09-'10
Failed Emissions: "Not Ready Codes"
Car is in OL with mods. Car failed thr OLDL plug in test. Anyone know what sets the "Not Ready" and how do I clean this up?
Also guessing I need to go back to CL!
Also guessing I need to go back to CL!
Le Mans Master
Joined: Aug 2005
Posts: 7,201
Likes: 0
From: DP(oh you know where) IL
St. Jude Donor '06
Well, that message will come up when you have recently cleared codes. The computer needs to go through a couple of cycles to get into ready mode again. If you are getting codes from a header install, just go to a tuner and get it dyno tuned and get the rear o2s deleted out. 
Team Owner
Joined: Mar 2001
Posts: 25,889
Likes: 7
From: Virginia Beach
CI 3-5-6-7-8 Veteran
I had this issue when I had headers and high-flow cats w/o any tune. I'd get codes for the cats not working properly very 2 or 3 weeks. I'd just clear them.
When it came time for an inspection I was introduced to the world of "not ready" codes. The car would never get through the proper amount of drive cycles before throwing another code.
I went to get it tuned, had the rear o2s turned off then all was well.
When it came time for an inspection I was introduced to the world of "not ready" codes. The car would never get through the proper amount of drive cycles before throwing another code.
I went to get it tuned, had the rear o2s turned off then all was well.
Team Owner
Joined: Mar 1999
Posts: 22,025
Likes: 192
From: At the beach in little Rhody
The tuner may not have done anything with the testing portion of turning off the rear O2's. I think something has to be done with the test for them as well. You may want to ask in the tuning section. Do you know which not-ready you were getting?
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
The cars in OPEN LOOP!
Well, your damed right it wont pass! What DTC are you throwing that cause it to remain in OPEN LOOP??
You cant just clear emission related DTC's and run right down to the station to get an emissions test while the CEL light is off. Your engine must complete a series of drive cycles and ignition on and off cycles to set ready flags for all of the emissions monitored systems that it uses to check emissions related stuff. There are DTC's that can be set that do not effect your emissions like; HVAC, RFA, LDCM, RDCM SCM IPC codes. You can clear those and pass emissions. Any PCM "P" related DTC cleared, will usually set a not ready flag.
Unless you mean that your using the speed density vise MAF.
Has your car been professionally tuned? Your tuner can remove the offending DTC from the PCM if they are not being used like the AIR Pump, rear 02 sensors etc.......
BC
Thread Starter
Safety Car
Joined: Nov 1999
Posts: 4,285
Likes: 83
From: S.E. WI.
St. Jude Donor '08-'09-'10
I asked them to be a careful and she told me she had driven more shift shift cars than I ever had. I said, I doubt it and told them to get my car off the rollers before she destroys my new Tex clutch.
Le Mans Master
Joined: Nov 2005
Posts: 6,993
Likes: 25
Some of the "IM" tests need some road time to run but I would think deleting the O2 sensors are going to be a problems passing the OBDII plugin test anyway. I'll have to look on my scanner again but I seem to recall 1 or 2 O2 tests rediness tests.
Here's how to get the tests to run:
http://www.obdii.com/drivecycle.html
Here's how to get the tests to run:
http://www.obdii.com/drivecycle.html
Last edited by dougbfresh; Jul 5, 2007 at 03:04 PM.
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Team Owner
Joined: Mar 1999
Posts: 22,025
Likes: 192
From: At the beach in little Rhody
Advanced
Joined: Dec 2004
Posts: 83
Likes: 0
From: Acworth GA
Usually not ready comes up when the battery is diconected and the car's ECU loose the emmision data it collects over time. You need to drive the car around for 1-2 weeks and it should relearn the car's emission performance. Car needs to be exposed to many driving conditions ( stop and go, freeway, etc. ).
Le Mans Master
Joined: Nov 2005
Posts: 6,993
Likes: 25
Like I said, I have to check the specific I/M tests on the Vette but Open Loop should really eat some fuel and if it's an automatic may not allow you into Overdrive. I have a couple of OBD scanners, a handheld and a laptop version. I can see the tests run on the laptop, the handheld just gives me status (pass/fail) on the I/M tests.
Racer
Joined: Jul 2004
Posts: 282
Likes: 2
From: Wappingers Falls NY
Not ready.
I see that alot where I work whenever we disconnect the battery we have to put on around 75-100 miles of driving so that all emissions devices reset then they will pass inspection. 2003-2004 a little more about 125 miles then all emissions devices reset.
