They can't be too old. Most codes clear if fault has not appeared after 30 ignition on/off cycles apart from airbags and possibly some other safety features.
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16684 - Random/Multiple Cylinder Misfire Detected P0300 - 35-10 - - - Intermittent
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That points to vacuum leak, bad MAF or as 2 and 4 are on the same bank possibly bad lambda or valve timing slightly off between banks.
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01119 - Gear Recognition Signal 35-10 - - - Intermittent (ABS section)
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most likely dirty ABS sensor or ring
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2: Immobilizer No Faults Found
or DTCs not supported by controller or a communication error ocurred
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FL does not have separate immobilizer so you need to scan instrument cluster.