Multiple Choice
Technician A says an air/fuel ratio sensor responds to minor changes in the air/fuel mixture. Technician B says that when an air/fuel ratio sensor is used on an OBD-II vehicle, both the upstream and downstream sensors must be air/fuel ratio type sensors. Who is correct?
A) A only
B) B only
C) both A and B
D) neither A nor B
Correct Answer:
Verified
Correct Answer:
Verified
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