Which items are checked to ensure the EVAP system is present during the VI?

• A. O2 sensor wiring.
• B. Evaporative canister lines, purge valve, and gas cap integrity.
• C. AIR pump lines.
• D. PCV valve.

Answer: (B)

The key idea is recognizing what items prove the EVAP system is present during a visual inspection. The EVAP system stores and controls fuel vapors, so you’re looking for its core visible components: the evaporative canister, the lines that connect it, the purge valve, and a gas cap that seals properly. If these parts are present and intact, it shows the EVAP system is in place to manage vapors. The gas cap must seal/fit properly to prevent vapor leaks, the purge valve provides a controlled path for vapors to enter the engine, and the canister with its lines ensures vapors are stored and routed correctly.

O2 sensor wiring relates to the oxygen sensor in the exhaust, not the EVAP system. AIR pump lines pertain to the secondary air injection system. The PCV valve is part of the crankcase ventilation system. These do not indicate the EVAP system’s presence, which is why the list including the evaporative canister lines, purge valve, and gas cap integrity is the correct focus.