Sensa ya okosijeni imabwezeretsanso chidziwitso cha mpweya wosakanikirana ku ECU pozindikira mpweya wa okosijeni mu mpweya wotuluka mu injini, ndipo imayikidwa pa chitoliro chotulutsa mpweya musanayambe njira zitatu zothandizira.

Zomwe zimakhudzidwa ndi sensa ya okosijeni yomwe imagwiritsidwa ntchito popanga siginecha yamagetsi ndi zirconium dioxide (ZrO2), yomwe imakhala ndi platinamu kunja kwake, ndi zitsulo zadothi kunja kwa platinamu kuteteza electrode ya platinamu.Mbali yamkati ya sensa ya okosijeni imawonekera mumlengalenga, ndipo mbali yakunja imadutsa mu mpweya wotulutsa mpweya wotulutsidwa ndi injini.Kutentha kwa sensayo kukakhala pamwamba pa 300 ℃, ngati mpweya wa okosijeni kumbali zonse ziwiri ndi wosiyana, mphamvu ya electromotive imapangidwa mbali zonse ziwiri.Mpweya wa okosijeni mkati mwa sensa ndi wokwera chifukwa umalowa mumlengalenga.Kusakaniza kukakhala kopyapyala, mpweya wa okosijeni mu mpweya wotuluka umakhala wochuluka.Kusiyana kwa mpweya wa okosijeni pakati pa mbali ziwiri za sensa ndi kochepa kwambiri, kotero mphamvu ya electromotive yopangidwa ndi iyo imakhala yochepa kwambiri (pafupifupi 0.1V).Komabe, kusakaniza kukakhala kolemera kwambiri, mpweya wa okosijeni mu mpweya wotulutsa mpweya umakhala wochepa kwambiri, kusiyana kwa mpweya wa okosijeni pakati pa mbali ziwiri za chinthu chodziwika bwino ndi chachikulu, ndipo mphamvu yopangidwa ndi electromotive imakhala yaikulu (pafupifupi 0.8V).Chotenthetsera mkati mwa sensa ya okosijeni chimagwiritsidwa ntchito kutenthetsa chinthu chovuta kuti chizigwira ntchito bwino.

Ngati sensa ya okosijeni ilibe chizindikiro kapena chizindikiro chotuluka sichikhala chachilendo, chidzawonjezera kuwononga mafuta ndi kuwononga injini, zomwe zimapangitsa kuti pakhale kuthamanga kosagwira ntchito, kupsa mtima komanso kuyankhulana.Zolakwika zambiri za sensa ya oxygen ndi:

1) Poyizoni wa manganese.Ngakhale mafuta otsogola sagwiritsidwanso ntchito, antiknock agent mu mafuta ali ndi manganese, ndipo manganese ions kapena manganese ions pambuyo kuyaka adzatsogolera pamwamba pa sensa ya okosijeni, kotero kuti sangathe kutulutsa zizindikiro zachilendo.

2) Kuyika kwa kaboni.Pambuyo pa pepala la platinamu la sensa ya okosijeni ndi carbon-deposit, zizindikiro zodziwika bwino sizingapangidwe.

3) Palibe mphamvu yamagetsi yamagetsi chifukwa chosalumikizana bwino kapena kutseguka kozungulira mkati mwa sensa ya okosijeni.

4) Chigawo cha ceramic cha sensa ya okosijeni chawonongeka ndipo sichingathe kupanga chizindikiro chamagetsi.

5) Waya wotsutsa wa chotenthetsera cha mpweya wa okosijeni watenthedwa kapena dera lake lathyoka, zomwe zimapangitsa kuti mpweya wa okosijeni ukhale wolephera kufika kutentha kwanthawi zonse.