Nthawi zambiri, malingaliro a mphamvu zamagetsi amadziwitsa kuti sensor chipinda cha oxygen chili pafupi ndi njira yotuluka, yomwe imakhazikika Kuti zitha kudziwa kuti siyinga iti yomwe ili ndi vuto, zomwe zimachotsa cholakwika cha kuchepa kwa matenda, ndipo nthawi zambiri kumachepetsa nthawi yodziwitsa theka la matani omwe angawonongeke. Chosinthira wamba chosinthira ndi sensor yambiri ya oxygen ndi njira yowongolera mafuta omwe nthawi zambiri amawongolera mafuta ogulitsa mafuta otetezeka kwambiri. Komabe, chosinthira cha Catalytic chidzawonongeka chifukwa chopumira (chifukwa cha kuyamwa koyenera, etc.), zomwe zimapangitsa kuti pakhale kuchepetsedwa kwa chitsulo chamalondo ndi kuphwanya kwa otembenuka kwa caltalytic.

Pamene chothandizira chimalephera, titha kudziwa kuti materici ndiofunika kwambiri kukonza chilengedwe ndi dongosolo lotha.

Maonekedwe a obd-II Diastiction amapanga dongosolo lowunika la obd-II-II-II-II-II-II-II Pogwira ntchito yokhazikika, kusinthasintha kwa sensor yabwino ya oxygen (yotentha) kuseri kwa chakudyacho kuyenera kukhala kocheperako kuwononga ma hydrocarbons ndikuchepetsa kusinthika kwa sensor-oxygen sensor.