1996 Ford F-150 P0411 Code: Secondary Air Injection System Fault

Do you have access to a service manual for the 1996 Ford F-150?

The reason the non-continuous monitors for catalyst, secondary air system, oxygen sensor, oxygen sensor heater, and EGR system haven't been triggered is likely because the fault codes have been cleared recently. To reactivate them, you'll need to complete a drive cycle. For P0411 specifically, inspect for cracked hoses or blocked piping. Additionally, check the check valve—ensure it's not leaking or obstructed.