DTC P1693: Transponder No Response Error_Invalid Response: General Description

Immobilizer (IMMO): A security device that permits vehicle to start only when the password code of key (transponder)/IMMO/EMS matches with each other to prevent vehicle theft.

It occurs when there is no "TP" in "Key" or when "TP" is broken in wireless security authentication between "IMMO ECU" and "Key (TP)". Without TP, engine start is impossible.