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Chapter Quiz

This activity contains 10 questions.

The sensor that must be warmed and functioning before the engine management computer will go to closed loop is the ________.

 O2S ECT sensor Engine MAP sensor BARO sensor

The voltage output of a zirconia oxygen sensor when the exhaust stream is lean (excess oxygen) is ________.

 Relatively high (close to 1 volt) About in the middle of the voltage range Relatively low (close to 0 volt) Either a or b, depending on atmospheric pressure

Where is sensor 1, bank 1 located?

 On the same bank where number 1 cylinder is located In the exhaust manifold On the bank opposite cylinder number 1 Both a and b

A heated zirconia oxygen sensor will have how many wires?

 2 3 4 Either b or c

A high O2S voltage could be due to ________.

 A rich exhaust A lean exhaust A defective spark plug wire Both a and c

A low O2S voltage could be due to ________.

 A rich exhaust A lean exhaust A defective spark plug wire Both b and c

An oxygen sensor is being tested with digital multimeter (DMM), using the MIN/MAX function. The readings are: minimum = 78 mV; maximum = 932 mV; average = 442 mV. Technician A says that the engine is operating correctly. Technician B says that the oxygen sensor is skewed too rich. Which technician is correct?

 Technician A only Technician B only Both Technicians A and B Neither Technician A nor B

An oxygen sensor is being tested using a digital storage oscilloscope (DSO). A good oxygen sensor should display how many switches per second?

 1 to 5 5 to 10 10 to 15 15 to 20

When testing an oxygen sensor using a digital storage oscilloscope (DSO), how quickly should the voltage change when either propane is added to the intake stream or when a vacuum leak is created?

 Less than 50 ms 1 to 3 seconds 100 to 200 ms 450 to 550 ms

A P0133 DTC is being discussed. Technician A says that a defective heater circuit could be the cause. Technician B says that a contaminated sensor could be the cause. Which technician is correct?

 Technician A only Technician B only Both Technicians A and B Neither Technician A nor B