P0139 Heated Oxygen Sensor Circuit Slow Response (bank 1, sensor 2)
Right Bank Heated Oxygen Sensor (rear) Circuit
Check Conditions
Engine coolant temperature is higher than 76°C (169°F). The right bank heated oxygen sensor (front) is active. The cumulative volume airflow sensor output frequency for every 2 seconds is higher than 4,000 Hz. Repeat 3 or more times: drive*1, stop*2.
Drive*1:
Engine speed is higher than 1,500 r/min. Volumetric efficiency is higher than 40 percent. Vehicle speed is higher than 30 km/h (18.7 mph). A total of more than 10 seconds have elapsed with the above mentioned conditions, and more than 2 seconds have elapsed with the fuel shut off.
Stop*2:
Vehicle speed is lower than 1.5 km/h (0.9 mph).
Judgement Criteria
Change in the output voltage of the right bank heated oxygen sensor (rear) is lower than 0.313 volt.
NOTE: Monitoring stops after fuel has been shut off for more than 38 seconds.
- Right bank heated oxygen sensor (rear) failed.
- PCM failed.
Right Bank Heated Oxygen Sensor (rear) Circuit
Check Conditions
Engine coolant temperature is higher than 76°C (169°F). The right bank heated oxygen sensor (front) is active. The cumulative volume airflow sensor output frequency for every 2 seconds is higher than 4,000 Hz. Repeat 3 or more times: drive*1, stop*2.
Drive*1:
Engine speed is higher than 1,500 r/min. Volumetric efficiency is higher than 40 percent. Vehicle speed is higher than 30 km/h (18.7 mph). A total of more than 10 seconds have elapsed with the above mentioned conditions, and more than 2 seconds have elapsed with the fuel shut off.
Stop*2:
Vehicle speed is lower than 1.5 km/h (0.9 mph).
Judgement Criteria
Change in the output voltage of the right bank heated oxygen sensor (rear) is lower than 0.313 volt.
NOTE: Monitoring stops after fuel has been shut off for more than 38 seconds.
- Right bank heated oxygen sensor (rear) failed.
- PCM failed.