Last time I had to test my car emissions I did a little work on it, which involved resetting check engine light (clearing the DTC trouble code). The car did not pass the test because a few systems were not ready. How can you tell if it is ready?
The answer is very simple and can be found in the service manual: turn the ignition key on, without starting the engine, and wait 20 seconds. If the car is not ready the check engine light will blink 5 times after 20 seconds. If it is ready it will just turn off. Typically you would need to drive about three days for the computer to do its thing and set the readiness codes.
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