I have borrowed a code reader and this particular one says no codes. The shop code reader usually says misfire in one or another cylinder and sometimes other things. Often these errors have not occurred to the best of my knowledge. I need to know if the computer will disable the car is I choose to ignore it.
I'm sorry you feel I've given you poor service.
Whether you choose to ignore the codes or not is irrelevant to the computer, as it is not in its programming to do so. However, many factors, including a bad computer, will certainly prevent the engine from running. Also, the engine will not start if the anti-theft system is active.
Is your engine not starting? If so, would you like me to help you diagnose the cause of the no start?