A DTC P0420 (Low Catalyst Efficiency) is stored in memory on a vehicle with an illuminated MIL. Technician A says that the root cause of the problem may be worn valve guide seals. Technician B says that a leaking exhaust system may have triggered the DTC. Who's right?

What will be an ideal response?


Both A and B

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?When inspecting valves from the valve body: Technician A says the edges of the spools should be damage-free but should not be sharp.Technician B says to identify a bent valve, install it into its bore and rotate it. If it binds or drags while it is being rotated, it is bent.Who is correct?

A. ?A only B. ?B only C. ?Both A and B D. ?Neither A nor B

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Usually there is a trade off between items in the cost plan.

Answer the following statement true (T) or false (F)

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Goats normally produce single kids at birth

Indicate whether the statement is true or false

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The proper term for Vise Grips is ________

A) Multigroove adjustable pliers B) Side cuts C) Locking pliers D) Slip joint pliers

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