Signal Waveform

Fig 1: O2 Sensor Signal Waveform Graph

Courtesy of KIA MOTORS AMERICA, INC.

• Signal decreases with rich air/fuel mixture and increases with lean air/fuel mixture
• Fuel cut-off mode (PCM will stop the fuel supply when release the accelerator pedal suddenly after engine running about 4000rpm): Approx. 3.2V

Fig 2: O2 And Throttle Position Sensor Signal Waveform Graph

Courtesy of KIA MOTORS AMERICA, INC.

A: Acceleration, B: Deceleration, C: Fuel Cut-off mode