Failed Emissions
#1
Racer
Thread Starter
Failed Emissions
My 2007 had been sitting for about 6 weeks while on vacation. Battery failed while gone. Changed battery and went for emissions test. Failed due to lack of data in computer. Question is how much driving do I have to do to get enough data before the retest?
#2
Le Mans Master
Member Since: Oct 2005
Location: Left Coast, San Diego
Posts: 6,654
Received 2,093 Likes
on
1,207 Posts
Can't help ya sorry. Have you tried calling dealers?
#3
Race Director
Do a Google search for GM drive cycle. It will tell you the specific driving conditions that you must complete to have all systems report "ready" for emissions testing.
The following users liked this post:
Duro (07-19-2017)
#4
Team Owner
Member Since: Dec 2012
Location: Outside the Quick Stop N.J.
Posts: 30,426
Received 1,597 Likes
on
1,074 Posts
If your failure report lists what sensors came back as "not ready" you can do a drive cycle specifically for those, or a Tech II or equivalent scanner can list (and sometimes run) those sensors.
#5
Team Owner
First check the test requirements for your state. When you disconnect the battery two smog test checked values are reset. Here in Nev, we can pass the test with one of those values failing but not both. So when I had this problem two years ago, all I had to do was start the car, let it run a few minutes or drive it, shut it down and let it sit for an hour or so then repeat. I did it five times over three days and did a retest and passed with only the one failure. You may be able to do the same thing if your state allows it.
The following users liked this post:
Duro (07-20-2017)
#8
Le Mans Master
Some reasonably priced scan tools have an "emissions readiness" tab. With it you can test whether your car's drive cycles are completed. The tool shows you the same data the test station is looking for.
This Actron CP9575 has become one of my favorites. I snapped these pics while testing out a friend's Mini Cooper before she went for emissions testing in AZ. Takes 2 minutes to run this test. You could test in your driveway, or carry it with you and test while in line.
Top level
Details
This Actron CP9575 has become one of my favorites. I snapped these pics while testing out a friend's Mini Cooper before she went for emissions testing in AZ. Takes 2 minutes to run this test. You could test in your driveway, or carry it with you and test while in line.
Top level
Details
Last edited by BlindSpot; 07-19-2017 at 07:05 PM.
#11
Instructor
Member Since: Sep 2010
Location: San Diego California
Posts: 152
Likes: 0
Received 7 Likes
on
5 Posts
smog test
I would figure about an hour but just driving it is not enough.
1) Make sure you have 3/4 tank of fuel and if you get below half tank, add enough fuel to get to 3/4 tank.
2) You will need some cold starts, warm up and drives(probably a couple)
3) Some drive time of maybe an hour total and that will probably take care of it.
Good luck.
1) Make sure you have 3/4 tank of fuel and if you get below half tank, add enough fuel to get to 3/4 tank.
2) You will need some cold starts, warm up and drives(probably a couple)
3) Some drive time of maybe an hour total and that will probably take care of it.
Good luck.
#13
Melting Slicks
I wish everyone well. I have over 200 drive miles on mine and the evap system is still not ready. I keep trying the drive cycle routine as well as driving normally and still no luck.