Technician A says that oxygen sensors used by diesel engines adjust air-fuel ratios. Technician B says that oxygen sensors can be used to adjust the amount of EGR gas metered into the cylinders. Who is correct?
A)Technician A
B)Technician B
C)Both A and B
D)Neither A nor B

Question

Quizplus · Accepted Answer

Technician B is correct because oxygen sensors can be used to adjust the amount of EGR (Exhaust Gas Recirculation) gas metered into the cylinders. Diesel engines typically do not use oxygen sensors to adjust air-fuel ratios like gasoline engines do.

Technician a Says That Oxygen Sensors Used by Diesel Engines