HEATED OXYGEN SENSOR (HO2S) HEATER CONTROL OUTLINE [ZJ, Z6]

B3E014000140T37

• Based on the control of the front and rear HO2S heaters, a stabilized oxygen concentration is detected even at low exhaust temperatures and feedback control of fuel injection even during cold engine start is made possible for improved cold temperature exhaust emission performance.

• When exhaust gas temperature is high, the front and rear HO2S are protected from a rise in temperature by the stopping of actuation to the front and rear HO2S heaters.