Step 2. Ensure ignition switch is OFF. Reconnect the battery 12v negative cable black wire to battery terminal -. Step 3. Cycle ignition switch to ON position and wait 1 minute, then start your vehicle. Step 4. Drive your vehicle for one week under normal driving conditions. During this period the emissions computer is gathering data and re-learning the condition of your vehicle's emissions components and systems.
The vehicle is undergoing what is referred to as a Drive Cycle. A drive cycle is a sequence of internal tests which the emissions computer runs while your vehicle is being driven. This ensures all emissions systems are functioning properly. Proper "readiness flags" are set as the computer completes it's cycles. Test cycles are unique to a vehicle. Certain cycles run under very strict parameters, and may require extended driving time to trigger on.
Cycle data and readiness flag information is available through your dealership's service department. The data vary widely. Emissions computer refuses to set a required readiness flag. No check engine light, but no chance of passing the emissions test either. However, you will not know this until your vehicle is smog tested. If the particular emissions test center doesn't offer a free re-test, you forfeit your inspection fee.
Step 5. Take the smog test. Important Note! Simple screens walk the operator through the test. Many stations also offer registration renewals once you have completed the test. OBD II is the lowest cost, most accurate inspection for newer vehicles. Vehicles and earlier will continue to be tested under the two-speed method. This light should not be ignored. Even though the vehicle might seem to be running just fine, there is a problem which has potential to increase emission levels.
One item you can check easily is the gas cap. A loose or broken gas cap will cause the Check Engine light to come on. The light go off by itself once the gas cap is properly tightened.
This allows the vehicle to continue operating until repairs can be made. Back-up or limp-home modes are not the most emission or fuel efficient way for the vehicle to operate. The problem needs to be repaired. Expensive emission components could be covered under warranty for up to 8 yrs or 80, miles, whichever occurs first.
DO get your annual emission test early. Remember, the test is valid for 90 days on renewals and private party transactions. If the emission test finds a problem with your vehicle, you will have some time to take care of the problem before your registration expires. A flashing light means that a problem exists that may cause damage to expensive emission control systems.
So, get your vehicle to a repair facility immediately. A ruined catalytic converter can cost thousands of dollars to replace. The vehicle will need to be driven under varying conditions for up to one week in order for the OBD-II system to run all of its on-board diagnostic tests. If your license plates are expired, or will expire within the week, go to your nearest DMV office and request a movement permit.
In the event you have any questions, please contact the Department of Motor Vehicles Emission Control Lab in your area. In Las Vegas, please call In Reno, please call The vehicle will need to be driven under varying conditions for up to one week. Additionally, erasing the codes may hide problems and make it more difficult to diagnose and fix your vehicle.
DON'T take the vehicle in for a test if you have a device that monitors your driving habits plugged in to the connector below the dashboard. You must remove the device and replace it after the test. Emission stations are required to fail the vehicle if such a device is plugged in. See also the U. You must have JavaScript enabled in your browser to utilize the functionality of this website. This entry was posted on April 9, by ScanTool. Does your state require an emissions check before renewing your registration?
These checks verify that your vehicle is not putting harmful vapors into the air. You might need to drive your vehicle for several more days, allowing any trouble codes and the 'Check Engine' light time to recur. If the light reappears, you'll need to address the fault, then drive around for a few days before your state will consider your vehicle "ready" for an emissions test. If it's not in a "ready" state, your vehicle will automatically fail.
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