Question

technician a says that in modern vehicles, an oxygen sensor is only positioned in the exhaust pipe after the catalytic converter. technician b says that the oxygen sensor provides the electronic body control module with an electrical signal that relates to the amount of oxygen in the exhaust gas. 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 is incorrect. In modern vehicles, oxygen sensors are often positioned both before and after the catalytic converter. The pre - catalytic converter sensor helps the engine control module (not the electronic body control module) adjust the air - fuel mixture, and the post - catalytic converter sensor monitors the efficiency of the catalytic converter.
• Technician B is incorrect. The oxygen sensor provides an electrical signal to the engine control module (ECM), not the electronic body control module, which is related to the amount of oxygen in the exhaust gas to help the ECM adjust the air - fuel ratio.

Answer:

d. Neither Technician A nor Technician B