Ngokuvamile, i-Engineering Logic yohlelo lokulawula impendulo kaphethiloli inquma i-Oxygen Sensor isondele egumbini lokuhlangana, kanye nejubane elikhulu le-sensor, njll. Izikhathi eziningi ze-sensor, njll. Abakhiqizi abaningi bafaka inzwa ye-oxygen ngaphansi kwesilinda ngasinye, ngakho-ke Ukuthi kunganquma ukuthi yiliphi i-cylinde elinenkinga, elisusa amathuba okuthola iphutha, futhi ezimweni eziningi linciphisa isikhathi sokuthola isifo ngokuqeda okungenani isigamu sezinkinga ezingaba yinkinga. Isiguquli esijwayelekile se-catalytic esinezinzwa ezi-oksijini ze-oxygen ezimbili kanye nohlelo lokulawula impendulo yamafutha evame ukulawula uhlelo lokuhambisa amafutha lungaqinisekisa ukuguqulwa okuphephe kakhulu kwezakhi ezingekho emthethweni e-Carbon onide nomumo wamanzi. Kodwa-ke, isiguquli se-catalytic sizolinyazwa ngenxa yokushisa ngokweqile (ngenxa yokwehla kabi, njll.), Okuzoholela ekwehlisweni kwe-catalyst surcest kanye nesono le-orific, zombili ezizolimaza unomphela i-converter ye-catalytic.

Lapho i-catalyst yehluleka, singazi ukuthi ochwepheshe babaluleke kakhulu ekulungiseni imvelo kanye nohlelo lokuqeda amandla.

Ukuvela kohlelo lokuxilongwa kwe-OBD-II kwenza uhlelo lokuqapha ebhodini lwe-OBD-II lokuqapha imvelo kanye nokutholwa okunembile kokuthola okulungile ngokuya ngezimpawu ze-oxidation zama-catalysts amahle noma amabi. Ekusebenzeni okuzinzile, ukuguquguquka kwesiginali kwenzwa ye-oxygen enhle (eshisayo) ngemuva kwe-catalyst kufanele kube ngaphansi kwe-oxidation amandla lapho kuguqula i-hydrocarbons kanye ne-carbon monoxide, okunciphisa ukuguquguquka kwesiginali kwe-post-oxygen sensor.