P0411
Secondary Air Injection System Incorrect Flow Detected
1997-2000 BMW 528i E39 2.8L I6 🇷🇺
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
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
- P0011Intake Camshaft Position Timing Over-Advanced Bank 1
- P0012Intake Camshaft Position Timing Over-Retarded Bank 1
- P0013Exhaust Camshaft Position Actuator Circuit/Open Bank 1
- P0014Exhaust Camshaft Position Timing Over-Advanced Bank 1
- P0015Exhaust Camshaft Position Timing Over-Retarded Bank 1
P0411 on Other Vehicles
Common Questions
What does code P0411 mean on a 1997-2000 BMW 528i E39?
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 BMW 528i E39?
Common symptoms of P0411 include: Check Engine Light, Failed emissions test.
What causes P0411 on a 1997-2000 BMW 528i E39?
Common causes of P0411 include: Blocked AIR passages, Stuck check valve, Weak AIR pump, Exhaust leak allowing backflow.