P2441moderate severityPowertrain
Secondary Air Injection System Switching Valve Stuck Closed Bank 1
on 2009 Audi A6 3.0L Supercharged V6 · AWD
What this code means
The secondary air switching valve bank 1 is stuck closed, preventing air injection.
Symptoms
- Check engine light
- High emissions at cold start
- Slow catalyst warm-up
Common causes
- Corroded/stuck valve
- No vacuum to valve
- Carbon buildup
Diagnostic steps
- Check vacuum supply to valve
- Inspect valve mechanism
- Verify air pump operation
Repair notes
Replace valve or repair vacuum supply.
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