Like I said I'm not shore if it can work.
ELV (electronic steering lock) when is not engage you can't start a car? And then fault comes up.
If make a another switch for ELV. Before you put a key in slot you press a switch or another key switch. Then you can start a car.
When they gona try to steal your car even with OBD socket is not gona work because you need to engage ELV.