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:

In the United States, vehicles produced after 1996 (OBD - II compliant) are required to monitor the efficiency of the catalytic converter. Catalyst monitoring is indeed accomplished using multiple oxygen sensors (up - stream and down - stream oxygen sensors to compare oxygen levels before and after the catalytic converter). So both statements are correct.

Answer:

c. Both Technician A and Technician B