A/F Sensor and HO2S Monitor (EVAP Leak Check Model)

OBD System Description - A/F Sensor and HO2S Monitor (EVAP Leak Check Model)

System Description / Monitoring Procedure

A/F sensor

A/F sensor is monitored maximum and minimum voltage, maximum and minimum current, lean-to-rich and rich-to-lean response rates when monitoring conditions are met. The sensor is also monitored for activity continuously.

HO2S

HO2S is used for catalyst monitoring and fuel control system (sub feed back). During monitoring conditions, HO2S is monitored max. and min. output voltages and compares the voltage with malfunction criteria.

DTC Description / Detecting / Confirmation Procedure

P0131, P0132

Refer to P0131 DTC P0131 / P0132 / P0134 / P2195 / P2196 / P2237.

P0133

Refer to P0133 DTC P0133.

P0134

Refer to P0131 DTC P0131 / P0132 / P0134 / P2195 / P2196 / P2237.

P0137, P0138

Refer to P0137 DTC P0137 / P0138.

P0139, P013E

Refer to P0139 DTC P0139 / P013E.

P2195, P2196

Refer to P0131 DTC P0131 / P0132 / P0134 / P2195 / P2196 / P2237.

P2237

Refer to P0131 DTC P0131 / P0132 / P0134 / P2195 / P2196 / P2237.

P2A01

Refer to P2A01 DTC P2A01.

A/F Sensor Monitor

Operation