Code
P0411
Emissions
Advertisement
Most likely causes
- مضخة هواء معطلة
- صمام يسرّب
Symptoms you may notice
- Check engine light
- Failed emissions test
Checks to run
- Verify the air pump runs at cold start
- Inspect check valves
- Check the fuses
Tools you may need
Multimeter
Always diagnose before replacing. Codes share symptoms; confirm the cause with measurements before buying parts.