Priporočljivo je natančno določiti zahteve za OBD glede na preprečevanje nedovoljenih posegov, odklop sistema nadzora neuspelih vžigov motorja pod nekaterimi delovnimi pogoji, shranjevanje podatkov o prevoženi poti, odkar je sistem opozoril voznika na napako, sposobnost OBD-sistema opravljati dvosmeren logični nadzor, uporabo P1- in P0-sklopov kod za označevanje napak po ISO 15031-6, konektor za diagnozo in izpisati mejne vrednosti praga OBD na dve decimalki natančno.
It is appropriate to clarify the OBD requirements in relation to tamper prevention, disablement of engine misfire monitoring during certain operating conditions, the storage of distance travelled by the vehicle while a malfunction is indicated to the driver through the malfunction indicator, the capability of the OBD system to perform bi-directional logic control, the use of the P1 and P0 fault code sets of ISO 15031-6, the diagnostic connector and to express the OBD threshold limits to two decimal places.