Signal Waveform & Data

Fig 1: Screen Display - Signal Waveform & Data Of O2 Sensor Heater Circuit (Bank 1 / Sensor 2)

Courtesy of ABLE BODY CORP.

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.