Here's how to bleed the air out of the power steering system on a Peugeot 206:
1. Turn the engine off and allow it to cool down.
2. Remove the cap from the power steering fluid reservoir.
3. Hold a hose over the reservoir inlet and blow air into it until all of the air bubbles are gone.
4. Replace the cap on the reservoir and start the engine.
5. Turn the steering wheel from lock to lock several times to help purge any remaining air from the system.
6. Check the power steering fluid level and add more fluid if necessary.
The power steering system on the Peugeot 206 is a closed system, and it does not need to be bled very often. However, if you notice that the steering wheel is feeling difficult to turn, you may need to bleed the system.