Cold start emissions reduction is being discussed. Technician A says that a strategy to reduce them is to delay the PCM going into close loop mode. Technician B says that an applicable strategy is to retard ignition timing during engine warmup. Who is correct?
A. Technician A
B. Technician B
C. Both A and B
D. Neither A nor B
Answer: B
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A. 2 B. 3 C. 4 D. 6
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Indicate whether the statement is true or false
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What are the two categories of diagnostic trouble codes?
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