How should severe corrosion on an emission component be documented?

• A. Document corrosion as a cosmetic issue only.
• B. It has no effect on VI.
• C. Severe corrosion should be documented as a potential weakness that can lead to leaks or device compromise; mark fail if compromised.
• D. It automatically triggers replacement.

Answer: (C)

Severe corrosion on an emission component signals a real loss of material integrity that can create leaks or allow the device to fail, so it must be treated as a functional issue during the visual inspection. Document it as a potential weakness and note that if the corrosion has compromised the component, it should be marked as a fail. This is more than cosmetic wear—the corrosion can affect seals, joints, or the housing and raise the risk of leaks or malfunction. It doesn’t automatically require replacement; the key is whether the component is compromised.