Technician A says that the conventional oxygen sensor produces a fluctuating high/low voltage signal. Technician B says an air/fuel ratio sensor produces a more constant output signal voltage. Who is correct?
A) A only
B) B only
C) both A and B
D) neither A nor B

Question

Quizplus · Accepted Answer

Technician A is correct because conventional oxygen sensors do indeed produce a fluctuating high/low voltage signal, indicating whether the exhaust is rich (high voltage) or lean (low voltage). Technician B is also correct because an air/fuel ratio sensor, also known as a wideband oxygen sensor, produces a more constant and precise output signal voltage that allows the engine control unit to closely monitor and adjust the air/fuel mixture for optimal performance and emissions.

Technician a Says That the Conventional Oxygen Sensor Produces a Fluctuating