I have a problem erasing codes.

Question

2006 Scion xb using innova 3150 d, i cant seem to erase codes in the enhanced data obd2. shouldn't the erase and reappear if th e problem still exisits?

Answer 1

P0300 Random misfire

If the misfire condition is not there then yes it should rease, if it does erase with the engine running use the scan tool and look into its pending code with the  scan tool, if there is a pending code showing, P0300  then you still have a misfire condtion.