Checking For Oxygen Sensor Switching

Tests 726 - 731:

Tests 732 - 735:

Tests 736 - 737:

SYMPTOM
* CHECKING FOR OXYGEN SENSOR SWITCHING

POSSIBLE CAUSES
- oxygen sensor < 0.10 volt defective
- oxygen sensor signal circuit short to ground
- Air filter or inlet ducts restrictions
- Fuel pump, lines, or injectors defective