Signal Waveform and Data

Fig 1: Display -- Heater And HO2S (S2) Signal Waveform

Courtesy of HYUNDAI MOTOR AMERICA

The amplitude of the signal output of the rear HO2S is small compared to the front HO2S because the rear HO2S detects emission gas purified by the catalytic converter. This is the normal signal waveform of the rear HO2S at idle.