Oxygen Sensor Monitor

OBD System Description - Oxygen Sensor Monitor

System Description / Monitoring Procedure

Primary A/F sensor
For a primary A/F sensor, the system monitors maximum and minimum voltage, lean-to-rich and rich-to-lean response rates, and switching cycles during monitoring conditions continuous. The sensor is also monitored for activity continuously.

Secondary HO2S
A secondary HO2S is used for catalyst monitoring. With non-aged catalyst system, amplitude of the voltage changing is very narrow and slow. But along with aging of the catalyst, the amplitude is going to be wider and quicker. Then the system calculates average of the voltage during monitoring conditions once per driving cycle, and compares the average with malfunction criteria.

DTC Description / Detecting Condition / Confirmation Procedure

P0133, P2A00
Refer to DTC P0133 / P2A00: O2 Sensor Circuit Slow Response / Performance (Sensor-1, Bank-1).

P0134
Refer to DTC P0140: O2 Sensor Circuit No Activity Detected (Sensor-2, Bank-1).

P0137, P0138
Refer to DTC P0137 / P0138: O2 Sensor Circuit Low Voltage / High Voltage (Sensor-2, Bank-1).

P0139, P2A01
Refer to DTC P0139 / P2A01: O2 Sensor Circuit Slow Response / Performance (Sensor-2, Bank-1).

P0140
Refer to DTC P0140: O2 Sensor Circuit No Activity Detected (Sensor-2, Bank-1).

P0153, P2A03
Refer to DTC P0153 / P2A03: O2 Sensor Circuit Slow Response / Performance (Sensor-1, Bank-2).

P0154
Refer to DTC P0154: O2 Sensor Circuit No Activity (Sensor-1, Bank-2).

P0157, P0158
Refer to DTC P0157 / P0158: O2 Sensor Circuit Low Voltage / High Voltage (Sensor-2, Bank-2).

P0159, P2A04
Refer to DTC P0159 / P2A04: O2 Sensor Circuit Slow Response / Performance (Sensor-2, Bank-2).

P0160
Refer to DTC P0160: O2 Sensor Circuit No Activity Detected (Sensor-2, Bank-2).

P2195, P2196
Refer to DTC P2195 / P2196: O2 Sensor Signal Stuck Lean / Stuck Rich (Sensor-1, Bank-1).

P2197, P2198
Refer to DTC P2197 / P2198: O2 Sensor Signal Stuck Lean / Stuck Rich (Sensor-1, Bank-2).

P2237
Refer to DTC P2237: O2 Sensor Positive Current Control Circuit / Open (Sensor-1, Bank-1).

P2238, P2239
Refer to DTC P2238 / P2239: O2 Sensor Positive Current Control Circuit Low / High (Sensor-1, Bank-1).

P2240
Refer to DTC P2240: O2 Sensor Positive Current Control Circuit / Open (Sensor-1, Bank-2).

P2241, P2242
Refer to DTC P2241 / P2242: O2 Sensor Positive Current Control Circuit Low / High (Sensor-1, Bank-2).

P2252, P2253
Refer to DTC P2252 / P2253: O2 Sensor Negative Current Control Circuit Low/High (Sensor-1, Bank-1).

P2255, P2256
Refer to DTC P2255 / P2256: O2 Sensor Negative Current Control Circuit Low/High (Sensor-1, Bank-2).

Primary A/F Sensor Monitor

Primary A/F Sensor Monitor:

Enable Conditions:

Typical Malfunction Thresholds:

Primary A/F sensor Circuit Monitor

Primary A/F sensor Circuit Monitor:

Enable Conditions:

Typical Malfunction Thresholds:

Secondary HO2S Monitor

Secondary HO2S Monitor:

Enable Conditions:

Typical Malfunction Thresholds:

Secondary HO2S Circuit Monitor

Secondary HO2S Circuit Monitor:

Enable Conditions:

Typical Malfunction Thresholds:

MODE $06 Data

A/F Sensor Monitor: