P0031

DTC P0031: HO2S-1 (Bank 1) Heater Circuit Low

Wiring Diagram:

Wiring Diagram

DTC Detecting Condition and Trouble Area:

DTC Detecting Condition and Trouble Area

DTC Confirmation Procedure

NOTE: Check to make sure that the following conditions are satisfied when using this "DTC Confirmation Procedure".
- Intake air temp.: -8 °C (18 °F) or higher
- Engine coolant temp.: -8 - 110 °C (18 - 230 °F)
- Altitude (barometric pressure): 2400 m, 8000 ft or less (560 mmHg (75 kPa) or more)

1. Connect scan tool with ignition switch OFF.
2. Turn ON ignition switch and clear DTC, pending DTC and freeze frame data by using scan tool and run engine at idle speed for 5 min.
3. Check pending DTC by using scan tool.

Step 1:

Step 2 - 4:

DTC Troubleshooting