Na'urar firikwensin iska tana canza iskar da aka tsotse zuwa siginar lantarki kuma ta aika zuwa sashin sarrafa lantarki (ECU) a matsayin ɗaya daga cikin mahimman sigina don tantance allurar mai.Dangane da ka'idodin auna ma'auni daban-daban, ana iya raba shi zuwa nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan za a iya raba su: firikwensin iska mai jujjuyawar iska (Toyota PREVIA tashar wagon), firikwensin iska na Carmen vortex (Motar Toyota Lexus LS400), firikwensin kwararar iska (injin VG30E don Nissan Maxima da Volvo). Injin B230F don motar Tianjin Sanfeng na cikin gida TJ6481AQ4) da firikwensin iska mai zafi.Biyu na farko nau'in kwararar ƙara ne, biyun na ƙarshe kuma nau'in kwarara ne.A halin yanzu, akwai nau'ikan na'urori masu auna iska guda biyu: sadaukarwar firikwensin iska mai gudana da fim mai zafi.

1. Rashin wutar lantarki na kwamfuta zai sa aikin injin mota ya yi muni kuma tattalin arzikin kasa ya ragu, don haka sai a fara duba igiyar wutar lantarki kafin a sauya kwamfutar mota.(Ya kamata igiyar wutar lantarki ta haɗa da wayar ƙasa da za a yi la'akari da ita azaman cikakkiyar igiyar wuta).

2. Idan siginar wutar lantarki na firikwensin iskar oxygen ya fi daidaitattun ƙima, yana iya zama cewa firikwensin ya gurɓata, kuma a yawancin lokuta zai sa rabon iskar gas ya wadata.

3. Idan siginar wutar lantarki na firikwensin iskar oxygen ya yi ƙasa da daidaitattun ƙimar, yana iya zama cewa firikwensin ba ya aiki, wanda zai haifar da ƙarancin iskar mai na injin.

4, Lokacin duba firikwensin oxygen dole ne ya yi amfani da multimeter na dijital, ko oscilloscope.

5. Idan mai zafi na firikwensin iskar oxygen ya yi kuskure, zai iya tsawaita lokacin buɗe madauki na injin kuma ƙara yawan man fetur.

6. Na'urar sanyaya zafin jiki na injin yana iya duba aikinsa tare da mitar dijital ko mitar analog.

7. A cikin da'irar ect na wasu kwamfutoci, za a sarrafa abin da ke ciki na ciki a wani yanayin zafin injin don canza ƙarfin lantarki akan firikwensin.Idan wutar lantarki a wannan lokacin ba ta da kyau yayin aunawa, ba yana nufin cewa firikwensin ya yi kuskure ba.

8. Gwajin na'ura mai sanyaya zafin jiki da na'urar firikwensin iska na iya amfani da daidai tsarin aiki iri ɗaya, amma abin da kawai za a lura shi ne cewa canjin yanayin zafin su ya bambanta, don haka ba za a sami siginar wutar lantarki ɗaya ba a yanayin zafi ɗaya.

9. Lokacin da bawul ɗin maƙura ya buɗe kuma an duba siginar wutar lantarki na firikwensin matsayi, ana iya duba kwanciyar hankali na firikwensin ta hanyar girgiza tare da ƙarfin da ya dace.Wannan hanyar tana da tasiri sosai ga wasu kurakuran haɗin kai.

10. Yawancin firikwensin matsayi huɗu na waya sun haɗa da madaidaicin matsayi mara aiki, wanda ake amfani da shi don samar da sashin sarrafa injin tare da bayanin yanayin aikin injin lokacin da ma'aunin yana cikin matsayi mara amfani.