HEATED OXYGEN SENSOR (HO2S) [SKYACTIV-G 1.5, SKYACTIV-G 2.0, SKYACTIV-G 2.5]

id0140g5004700


Purpose/Function

•  Detects the oxygen concentration (theoretical air/fuel ratio) in the exhaust gas as basic information (mainly used to determine the fuel injection amount and the deterioration of catalytic converter) and sends it to the PCM as an oxygen concentration (theoretical air/fuel ratio) signal.

Construction

•  Installed on the rear side of the exhaust manifold.
am3zzn00003596
•  A zirconia element has been adopted (as the detecting element) for detecting the oxygen concentration (theoretical air/fuel ratio).

Operation

•  Sends the signal, which fluctuates according to the oxygen concentration (theoretical air/fuel ratio), to the PCM.
•  The PCM applies approx. 1.5 V to the HO2S input voltage to prevent incorrect diagnosis of the HO2S input voltage.
am3zzn00003597

HO2S characteristic

am3uun00001714

Fail-safe

DTC No.

Fail-safe function
P0037:00
•  Stops the fuel feedback control.
P0038:00
•  Stops the fuel feedback control.
P0137:00
•  Fixes duty value of A/F sensor heater
•  Stops fuel feedback control of A/F sensor