P0031

DTC P0031 / P0032: HO2S Heater Control Circuit Low / High (Sensor-1, Bank-1)

Wiring Diagram:

System and Wiring Diagram

A/F Sensor Description
Refer to A/F Sensor Description

NOTE:
When DTC P0031, P0037, P0051 and P0057 are indicated together, it is possible that HO2S heater relay circuit wire is open or short to ground.
When DTC P0032, P0052 are indicated together, it is possible that A/F sensor heater ground circuit is open or high resistance.

DTC Detection Condition And Trouble Area:

DTC Detecting Condition and Trouble Area

DTC Confirmation Procedure
1. With ignition switch turned OFF, connect scan tool to DLC.
2. Turn ON ignition switch and clear DTC.
3. Start engine and warm up to normal operating temperature.
4. Run engine at idle speed for 1 min. or more.
5. Check DTC and pending DTC.

Step 1-4 (Continued):

Step 4 (Continued)-6:

Step 6 (Continued)-9:

DTC Troubleshooting

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