Oxygen Sensor: Testing and Inspection
Ford provides Trouble Code/Symptom driven diagnostics for this component.
Diagnostic procedures can be found in:
Gas Vehicles - Pinpoint Test H. H - Fuel Control
Flexible Fuel Vehicles - Pinpoint Test HB. HB - Flexible Fuel (FF) Control
For complete diagnostics, refer to Computers and Control Systems / Testing and Inspection. Testing and Inspection