Signal Waveform

Fig 1: O2 Sensor Voltage Signals (Acceleration)

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 Sensor Voltage Signals (Deceleration)

Courtesy of KIA MOTORS AMERICA, INC.

Fig 3: O2 Sensor Voltage Signals (Fuel Cut-Off Mode)

Courtesy of KIA MOTORS AMERICA, INC.

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