Diagnose the Issue

• Start by checking the power steering fluid level in the reservoir. Low fluid can cause the power steering to fail.
• If the fluid level is low, inspect for any leaks in the power steering system, including the hoses and connections.
• Look for any unusual noises when turning the wheel, as this could indicate a damaged power steering pump or other components.

Check the Power Steering Fluid

• Ensure the car is on a level surface and the engine is cold to get an accurate reading.
• Locate the power steering fluid reservoir. For the 2008 Porsche 911 Turbo (997), it's typically found near the front of the engine compartment.
• Remove the cap and check the fluid level. If it's below the minimum mark, add power steering fluid until it reaches the recommended level.

Inspect for Leaks

• With the engine off, examine the power steering fluid reservoir, hoses, and connections for any signs of fluid leakage.
• If you find any leaks, you'll need to replace the damaged hoses or connections. This may require specialized tools and parts specific to the Porsche 911 Turbo (997).
• Clean any spilled fluid with a suitable automotive cleaner to prevent slipping or other issues.

Check the Power Steering Pump

• If the fluid level is fine and there are no leaks, the power steering pump might be the issue.
• Listen for any whining or grinding noises when the engine is running and you are turning the steering wheel. Such noises often point to a failing power steering pump.
• If the pump is suspected to be the problem, it will likely need to be replaced. Refer to the vehicle’s manual for specific removal and installation instructions.
• Typically, you will need to disconnect the belt, remove mounting bolts, and swap out the old pump for a new one. Ensure all connections are secured before starting the engine.

Bleed the Power Steering System

• After adding new fluid or replacing any components, you should bleed the power steering system to remove any air pockets.
• Start the engine and slowly turn the steering wheel from lock to lock several times to circulate the fluid.
• Check the fluid level again and top it off if necessary.
• Test the steering to ensure it's working smoothly without any noise or resistance.

Seek Professional Help

• If you're not comfortable performing these checks or repairs yourself, it’s best to take your car to a professional mechanic who is familiar with the Porsche 911 Turbo (997).
• Professional mechanics have the necessary tools and expertise to diagnose and fix power steering issues accurately.