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100 to 150 miles
It depends on where you live. In California you will not
There are pages and pages of things that can cause a check engine light. You need to have it checked with a scantool. Then the code can be diagnosed and repaired.
I'd wait for at least a 150 miles ... if you have it checked too soon, there won't be enough stored data for the system to relay to the smog check machine.
I found this information at http://www.smogtips.com Contrary to public belief, the Check Engine light being illuminated anytime during the smog inspection is automatically a smog failure. Vehicle manufacturers have placed the Check Engine light inside the passenger compartment to inform the driver there has been or is an engine or drive train malfunction. Very often you may not notice an engine problem, but this is only because your engine's computer is operating under pre-programmed information rather then of real-time. In other words the problem still exists but your engine learns to live with it. To avoid spending hundreds down the road, the Check Engine light should be diagnosed as soon as possible by a reputable and certified auto repair station. Our recommendation is you have a certified smog repair shop conduct a full system diagnosis. Along with the "Check Engine" light being illuminated or not, there are stored computer codes in the engine contol computer which the smog station will be able to retrieve and use for diagnosing purposes. These codes more then often will direct the smog technian in finding the fault. For more information you may want to locate a reputable smog service center in your area by simply typing in your zip code in the Smog Shop Locator search section at www.smogtips.com
Dense smog and light smog
check the smog pump ,,,i had the same problem on my 95 z28
The check engine light (service engine soon) comes on and stays on when a problem is detected by the self diagnosis system of your vehicle. Generally, the problem is in the emissions or something that is affecting the effectiveness of the emissions, but other causes can trigger the light to come on, too. To determine the cause, the vehicle will need to be taken to a parts store or a shop that has an OBD2 scanner, or for 1995 and earlier models, an OBD1 scanner, While a scanner will not give you the magic answer, it will give you a code that narrows down the problem area. You will have to repair the cause of the light to pass smog. If you simply shut the light off, the smog test will still fail.
when they check your car!
Photochemical smog
No, there will be no problem at the DMV. The important thing is that the DMV has received your vehicle's smog check certificate number and the vehicle has passed. The reason for the smog test is simply for smog check data which is obtained by Sacramento and used for analysis.
no anything below 76 is a no smog