P1411 Secondary air flow too low (bank 2)

By: Diagno editorial team · Updated: 2026-10-15

P1411 means: Secondary air flow too low (bank 2). The secondary air system blows air into the exhaust on a cold start so the catalytic converter warms up faster. OK to drive, but have it checked soon. The most common repair costs about €200–400 in Estonia, depending on make and model.

What it means

The secondary air system blows air into the exhaust on a cold start so the catalytic converter warms up faster. The computer found too little air or a fault in the pump or valve control.

This is a make-specific code (VAG). The exact meaning can vary by model and year.

What you may notice

• Engine light on
• Unusual pump noise on a cold start
• Usually no change in driving

What could be wrong

1. 1Air pump seized by moisture or burnt out · Secondary air pump or valve replacement €200–400
2. 2Check valve stuck · Valve or actuator replacement €120–240
3. 3Hose loose or cracked · Leak check and hose or gasket replacement €60–120
4. 4Pump relay or fuse · Fuse replacement and cause check €30–60

Repair difficulty: Moderate

What you can check yourself

On a cold start, listen for the pump droning in the engine bay for a few seconds. You can check the simple things yourself, but the repair is best done in a workshop.

How we fix it

1. We check pump and valve operation with the diagnostic tool
2. We check the hoses and relay
3. We replace the pump or valve

Standard SAE description: Secondary Air Injection System, Bank 2 Flow too Low