Circuit/System Verification

Verify no HO2S 1 DTCs are set.
- If a DTC is set
  Refer to Diagnostic Trouble Code (DTC) List - Vehicle
- Go to next step: If a DTC is not set
Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
Verify a DTC does not set.
- If a DTC sets
  Refer to Diagnostic Trouble Code (DTC) List - Vehicle
- Go to next step: If a DTC does not set
All OK.