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You have to make sure your readiness monitors are passing/ complete . 2001 + your allowed one monitor to be failed/ incomplete and must not have a check engine light. And also whatever stuff you have missing the tune should have these monitors passing/complete.
My other car doesn't even have a mass air flow sensor, no cat, no post 02 sensor and a bunch of other sensors and still pass because of the programming forcing all monitors to pass/complete
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