Catalytic converter monitors are being discussed. Technician A says that if the converter is working, the downstream signal frequency should mirror the upstream sensor. Technician B says that the downstream sensor should provide a low-frequency voltage signal. Who is correct?
A)A only
B)B only
C)both A and B
D)neither A nor B

Question

Quizplus · Accepted Answer

Technician B is correct because a properly functioning catalytic converter will cause the downstream oxygen sensor to produce a low-frequency voltage signal, indicating that the converter is storing and releasing oxygen effectively. Technician A is incorrect because if the converter is working properly, the downstream signal should not mirror the upstream sensor.

Catalytic Converter Monitors Are Being Discussed