P0140

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

System And Wiring Diagram:

Wiring Diagram

DTC Detecting Condition And Trouble Area:

DTC Detecting Condition and Trouble Area

WARNING:
- When performing a road test, select a place where there is no traffic or possibility of a traffic accident and be very careful during testing to avoid occurrence of an accident.
- Road test should be carried out by 2 persons, a driver and a tester, on a level road.

NOTE:
Check to make sure that following conditions are satisfied when using this "DTC Confirmation Procedure".
- Engine coolant temperature: 70 °C (158 °F) or more.
- Engine coolant temperature at engine start: -10 °C (14 °F) or more.
- Intake air temperature: -10 °C (14 °F) or more.
- Atmospheric pressure: higher than 75 kPa (560 mmHg) (Altitude: lower than 2790 m (9150 ft)).
- The following DTCs are not detected: MAF sensor, ECT sensor, IAT sensor, Fuel system, PCV, A/F sensor, TP sensor, HO2S sensor heater and HO2S sensor (other than DTC P0140).

1. With ignition switch turned OFF, connect scan tool.
2. Turn ON ignition switch and clear DTC using scan tool.
3. Start engine and warm up to normal operating temperature.
4. Drive vehicle at 40 mph (60 km/h) or higher. (engine speed: 2500 - 3000 r/min.)
5. Keep above vehicle speed for 4 min. or more. (Throttle valve opening is kept constant in this step.)
6. Check if DTC and pending DTC exist by using scan tool. If not, check if oxygen sensor monitoring test has been completed by using scan tool. If not in both of above checks (i.e., no DTC and pending DTC and oxygen sensor monitoring test not completed), check vehicle condition (environmental) and repeat Step 3) through 6).

Step 1-3 (Continued):

Step 3 (Continued)-4:

DTC Troubleshooting

NOTE: Before this trouble shooting is performed, read the precautions for DTC troubleshooting referring to Precautions for DTC Troubleshooting.