APPAREIL DE DÉTECTION DE DÉFAILLANCES POUR CAPTEUR DE GAZ ET PROCÉDÉ DE DÉTECTION DE DÉFAILLANCE POUR CAPTEUR DE GAZ

摘要

A failure detection apparatus for a gas sensor includes an electronic control unit (12) configured to: perform control so that a predetermined voltage, which is a positive voltage and is a voltage lower than a limiting current range when the gas sensor (10) does not fail, is applied between a pair of electrodes (102, 103); acquire a determination current, which is a current flowing between the pair of electrodes when the predetermined voltage is applied between the pair of electrodes; and determine whether the gas sensor fails based on the acquired determination current.