Technician a Says an Air/fuel Ratio Sensor Responds to Minor

question 46

Multiple Choice

Technician A says an air/fuel ratio sensor responds to minor changes in the air/fuel mixture. Technician B says that when an air/fuel ratio sensor is used on an OBD-II vehicle, both the upstream and downstream sensors must be air/fuel ratio type sensors. Who is correct?

• A)A only
• B)B only
• C)both A and B
• D)neither A nor B

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