How do you turn off Code P0411?

To turn off Code P0411, which indicates an issue with the secondary air injection system, first diagnose the root cause, such as a faulty air pump, clogged hoses, or defective sensors. Repair or replace any identified faulty components, then clear the trouble code using an OBD-II scanner. After repairs, take the vehicle for a test drive to ensure the code does not reappear. If the problem persists, further investigation may be necessary.