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Re: 1999 Malibu too many unset (not read) readiness codes(OBDII) inspection failed help ?
I believe the car needs to make it up to freeway speed for a period of time before those sensors will show ready.
Take a drive for an hour or so, getting up to speed. You might want to run by Autozone after that to see if they would check the OBD2 for any codes and sensor readiness state before you go back to the inspection station.
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