Signal Waveform & Data

Fig 1: Upstream And Downstream HO2S Normal Waveforms (Chassis Ground Used)

Courtesy of HYUNDAI MOTOR AMERICA

Fig 2: Upstream And Downstream HO2S Normal Waveforms (Sensor Ground Used)

Courtesy of HYUNDAI MOTOR AMERICA

Fig 3: Upstream And Downstream HO2S Normal Graph (At Idle)

Courtesy of HYUNDAI MOTOR AMERICA

When at operating temperature, if accelerator pedal is released suddenly, around 4000 rpm, the HO2S signal reading will be lower than 200 mV, resulting from Fuel cut-off for the moment. Conversely, with sudden accelerator pedal depress, HO2S signal reading will be around 0.6V ~1.0V. At idle, HO2S signal will switch from lean to rich at 3 Hz, on acceleration, its frequency increases.