Question

technician a says that any vehicle produced after 1996 must monitor the efficiency of the catalytic converter. technician b says that catalyst monitoring is accomplished with multiple oxygen sensors. who is correct? a. technician a b. technician b c. both technician a and technician b d. neither technician a nor technician b

Explanation:

• Technician A: Vehicles produced after 1996 (OBD - II compliant) are required to monitor the efficiency of the catalytic converter. This is part of the On - Board Diagnostics (OBD) system requirements to ensure emissions compliance.
• Technician B: Catalyst monitoring is indeed accomplished with multiple oxygen sensors. Typically, there is a pre - catalytic converter oxygen sensor and a post - catalytic converter oxygen sensor. The difference in their signals (such as the frequency of voltage fluctuations) is used to determine the catalytic converter's efficiency.

Answer:

C. Both Technician A and Technician B