My scanner (MaxiDas DS808) no longer shows my DTC codes for my vehicle when I go into diagnostic mode. During the autoscan it will show that I have a DTC set for the engine but when I go to view it, it says no codes found. I have to log all the way out then go to the EOBD mode to be able to see the code. It only does this on some vehicles not all. Any help would be appreciated. Thanks in advance.

Tags: ds808 , cant_read_codes