The P0411 trouble code is associated with Secondary Air Injection System Incorrect Flow Detected, indicating that the flow of air in the secondary air injection system is not as expected.
Secondary Air Injection System Incorrect Flow Detected
Code symptoms P0411.
1. Illuminated “Check Engine” or “Service Engine Soon” light on the dashboard.
2. Poor engine performance.
3. Increased emissions.
This code is common in brands such as:: Chevrolet, Renault, Ford, Toyota, Nissan, Mercedes Benz, Honda.
Causes of the code P0411.
1. Problems with the secondary air injection pump.
2. Faulty air diverter valve.
3. Issues with the air injection system’s hoses or pipes.
4. Problems with the Engine Control Module (ECM).
Code Solutions P0411.
1. Inspect and, if necessary, replace the secondary air injection pump.
2. Check and, if needed, replace the malfunctioning air diverter valve.
3. Inspect and repair any issues with the hoses or pipes in the air injection system.
4. If ECM issues are suspected, consult a qualified technician for diagnosis and potential reprogramming or replacement.