P2441moderate severityPowertrain
Secondary Air Injection System Switching Valve Stuck Closed Bank 1
on 2001 BMW M3 3.2L I6 S54 · RWD
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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Other Powertrain codes on this vehicle
29CC
Misfire Cylinder 1
29CD
Misfire Cylinder 2
29CE
Misfire Cylinder 3
29CF
Misfire Cylinder 4
29D0
Misfire Cylinder 5
29D1
Misfire Cylinder 6
29D2
Misfire Cylinder 7
29E0
Lambda Additive/Idle Adaptation Limit, Bank 1
29E1
Lambda Additive/Idle Adaptation Limit, Bank 2
29E2
Lambda Multiplicative Part-Load Adaptation Limit, Bank 1