P0411
Secondary Air Injection System Incorrect Flow Detected
2016-2021 Mazda CX-3 2.0L I4 🇨🇦
Moderate SeverityPowertrain
Description
The secondary air injection system is not providing the expected airflow.
Symptoms
- Check Engine Light
- Failed emissions test
Common Causes
- Blocked AIR passages
- Stuck check valve
- Weak AIR pump
- Exhaust leak allowing backflow
Diagnostic Steps
- Monitor O2 sensor during AIR pump activation (should go lean)
- Check AIR pump output
- Inspect check valve
- Check for blocked passages
Repair Notes
Clear blockage or replace AIR pump/check valve.
Related Codes
Other Powertrain Codes
- P0001Fuel Volume Regulator Control Circuit/Open
- P0001Fuel Volume Regulator Control Circuit/Open
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
- P0004Fuel Volume Regulator Control Circuit High
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
P0411 on Other Vehicles
Common Questions
What does code P0411 mean on a 2016-2021 Mazda CX-3?
P0411 stands for "Secondary Air Injection System Incorrect Flow Detected". The secondary air injection system is not providing the expected airflow.
What are the symptoms of P0411 on a Mazda CX-3?
Common symptoms of P0411 include: Check Engine Light, Failed emissions test.
What causes P0411 on a 2016-2021 Mazda CX-3?
Common causes of P0411 include: Blocked AIR passages, Stuck check valve, Weak AIR pump, Exhaust leak allowing backflow.