P0131

DTC P0131: Heated Oxygen Sensor (HO2S) Circuit Low Voltage (Bank - 1 Sensor - 1)

Wiring Diagram:

DTC Detecting Condition And Trouble Area:

DTC Confirmation Procedure

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

NOTE:
Check to make sure that the following conditions are satisfied when using this DTC confirmation procedure.
- Intake air temp.: -14 °C, 6.8 °F or higher
- Altitude (barometric pressure): 2020 m, 6650 ft or less (540 mmHg, 72 kPa or more)

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 the vehicle speed for 6 min. or more. (Throttle valve opening is kept constant in this step.)
6. Release accelerator pedal and with engine brake applied, keep vehicle coasting (with fuel cut for 3 sec. or more) and then stop vehicle.
7. Check DTC and pending DTC.

Step 1 - 3:

Step 4 - 9:

Step 10 - 11:

DTC Troubleshooting