Deck 76: Oxygen Sensors

Question 1

When the exhaust is rich, the PCM applies a ________ current into the pump cell (dual cell sensor).

A)Neutral
B)Positive
C)Negative
D)None of these

Answer 1

Negative

Question 2

A conventional oxygen sensor heater uses about ________ amps.

A)8 to 10
B)0.8 to 2.0
C)0.5 or less
D)More than 10

Answer 2

0.8 to 2.0

Question 3

A wide band oxygen sensor can be made using what design?

A)Finger and thimble
B)Cup and thimble
C)Cup and planar
D)Dual cell and single cell

Answer 3

Dual cell and single cell

Question 4

When the concentration of oxygen on the exhaust side of the thimble is low (rich exhaust), a voltage of ________ is generated between the electrodes.

A)10-20
B)1.0-2.0
C)0.60-1.0
D)0.25-0.50

Question 5

A wide band oxygen sensor heater can draw how much current (amperes)?

A)8 to 10 A
B)0.8 to 2.0 A
C)6 to 8 A
D)2 to 4 A

Question 6

An oxygen sensor is being tested with a digital multimeter 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 normally. Technician B says that the oxygen sensor is skewed too rich. Which technician is correct?

A)Technician A only
B)Technician B only
C)Both technicians A and B
D)Neither technician A nor B