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    Exam 34: Emission Control Diagnosis and Service
  5. Question
    Excessively High CO Emissions May Be Caused by a ______
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Excessively High CO Emissions May Be Caused by a ______

Question 66

Question 66

Multiple Choice

Excessively high CO emissions may be caused by a ______.


A) lean air/fuel mixture
B) missing air filter
C) higher than normal fuel pressure
D) all answers are correct

Correct Answer:

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