Oxygen sensor monitors are being discussed. Technician A says the system monitors the sensor response time as the system cycles lean-rich-lean. Technician B says that at certain times the monitor varies the fuel delivery and checks for heated oxygen sensor response. Who is correct?
A)A only
B)B only
C)both A and B
D)neither A nor B

Question

Quizplus · Accepted Answer

Both Technician A and Technician B are correct. Technician A is correct in stating that the system monitors the sensor response time as it cycles between lean and rich conditions, which is a way to ensure the oxygen sensor is functioning properly by responding to changes in the air-fuel mixture. Technician B is also correct in saying that the monitor can vary fuel delivery to check the heated oxygen sensor's response, which is another method to ensure the sensor is accurately detecting changes in the air-fuel mixture and adjusting accordingly.

Oxygen Sensor Monitors Are Being Discussed