Ngokubanzi, inkqubo yobunjineli yenkqubo yokulawulwa kwe-oyile imisela ukuba i-issor ye-oxygen isondele kakhulu, kwaye igqitywe yindawo yegesi, igesi. Kwisilinda ngasinye, ukuze sikwazi ukumisela ukuba yeyiphi ingxaki enengxaki, esusa ukuba imposiso yempazamo, kwaye kwiimeko ezininzi zinciphisa isiqingatha sezilongo ezinokubakho. Umguquleli oqhelekileyo onesifo se-oxygen ye-oxygen kunye nenkqubo yokulawulwa kwe-Oel eqhele ukulawula inkqubo yokufumana ipetroli inokuqinisekisa olona tshintsho lube ne-carbon ongenabungozi kunye nomphunga wamanzi. Nangona kunjalo, umguquleli ongumqwebeti uya konakaliswa ngenxa yokutshintsha (ngenxa yokungasebenzi kakuhle (ngenxa yokungasebenzi kakuhle, njl njl.

Xa i-Catalyst isilele, siyazi ukuba iingcali zibaluleke kakhulu ekuvuseleleni imeko kunye nenkqubo yokuphelisa.

Ukubonakala kwenkqubo ye-OBD-II yenza inkqubo yokuhlola iBhodi yeBhodi kunye neNkqubo yeNdawo yeNdawo yeNdawo yeNdawo yokusiNgqongileyo kunye nokuKhangela okuKhawulezayo kuthetha ngokutsho kweempawu ze-Oxidation ezizodwa okanye ezimbi. Ngomsebenzi ozinzileyo, ukuguquguquka komqondiso we-Oxygen ye-OXYGEN (i-shot) ngasemva kwayo nayiphi na i-cataightst engaphantsi kwe-oxyrocarbles kwindawo ye-Oxdrocarst kunye ne-Carbon Monoxide, enciphisa i-stoxgen ye-post-ossor.