P0161

DTC P0161 O2 SENSOR HEATER CIRCUIT (BANK2 SENSOR2)

1. OUTLINE OF DIAGNOSIS
Detect the malfunction of rear oxygen sensor heater.
While observing the engine condition, judge as NG if the rear oxygen sensor impedance is great.

2. COMPONENT DESCRIPTION






3. ENABLE CONDITION






4. GENERAL DRIVING CYCLE
Perform the diagnosis continuously 1000 ms or more after starting the engine.

5. DIAGNOSTIC METHOD

Abnormality Judgment
If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.






Time Needed for Diagnosis: 4 ms x 2500 time (s)

Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.

Normality Judgment
Judge as OK and clear the NG if the continuous time while the following conditions are established is more than the predetermined time.






Time Needed for Diagnosis: 4 ms x 2500 time (s)