Technician a Says That a Wide-Band Oxygen Sensor, Also Called

question 18

Multiple Choice

Technician A says that a wide-band oxygen sensor, also called a lean air-fuel (LAF) sensor, can detect air-fuel ratios from as rich as 10:1 to as lean as 23:1. Technician B says that the oxygen sensor signal determines fuel trim which is used to tailor the air-fuel mixture for the catalytic converter. Which technician is correct?

• A) Technician A only
• B) Technician B only
• C) Both technicians A and B
• D) Neither technician A nor B

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