If you clear ECM or TCM DTCs all I/M readiness flags are set to not ready. It's the law. Thank California ARB.
Note that EVAP requires one good trip to pass several tests and two failures to set a DTC and set I/M to not ready. The small leak EVAP test run after the vehicle is shutoff while it cools down, the ECM will monitor conditions and test for up to 40 mins after shutdown. After shutting down you need to leave your ride alone and just let it do its thing. No checking the LEDs and such. Maybe you're at work, or getting a meal, enjoy and let the ECM work.
Oh yeah, don't add fuel between cold starts when you are trying to get the I/M flags set.
It may seem tricky, it's not. The systems are set to run tests in "normal use", not with ECM clearing, changing, etc. So once you have your set up, enjoy drving it and in time the on board systems will report their findings.
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