July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!
Signal Waveform & Data
Fig 1: Display - Signal Waveform HO2s
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.