Which statement about the Other Emission Related Components category is true?

• A. It covers components that do not affect emissions
• B. It requires visual inspection as part of the category
• C. It includes components that affect emissions and are not part of primary engine systems
• D. It has nothing to do with emissions

Answer: (C)

The category is about parts that influence emissions but aren’t part of the engine’s main, primary systems. These components belong to the emissions control or related subsystems, so their condition or presence can affect how clean the vehicle runs even though they aren’t core engine parts. That’s why describing them as elements that affect emissions and are not part of the primary engine systems is the best fit. The other statements would imply no effect on emissions, or redefine the category by inspection requirements or non-emissions focus, which doesn’t align with how these components function in the emissions control system.