Oxygen Sensor Monitor

OBD SYSTEM DESCRIPTION - OXYGEN SENSOR MONITOR

System Description / Monitoring Procedure

Primary HO2S
For a primary HO2S, the system monitors maximum and minimum voltage, lean-to-rich and rich-to-lean response rates, and switching cycles. The sensor is also monitored for activity continuously.

Secondary HO2S
A secondary HO2S is used for catalyst monitoring and dual oxygen sensor control for fuel control system. During monitoring conditions, the system measures maximum and minimum output voltages and compares the voltage with malfunction criteria.

DTC Description / Detecting Condition / Confirmation Procedure

P0131, P0132
Refer to DTC P0131 / P0132: O2 Sensor Circuit Low / High Voltage (Sensor-1) (For Vehicle with ORVR). P0131 P0132

P0133
Refer to DTC P0133: O2 Sensor Circuit Slow Response (Sensor-1). P0133

P0134
Refer to DTC P0134: O2 Sensor No Activity Detected (Sensor-1). P0134

P0137, P0138
Refer to DTC P0137 / P0138: O2 Sensor Circuit Low / High Voltage (Sensor-2) (For Vehicle with ORVR). P0137 P0138

P0139
Refer to DTC P0139: O2 Sensor Circuit Slow Response (Sensor-2). P0139

P2A00
Refer to DTC P2A00: O2 Sensor Circuit Range / Performance. P2A00

P2A01
Refer to DTC P2A01: O2 Sensor Circuit Range / Performance. P2A01













Primary HO2S Monitor










Primary HO2S Circuit Monitor










Secondary HO2S Circuit Monitor










Secondary HO2S Monitor




MODE $06 Data