A failing power steering seal can cause a variety of symptoms, including:

1. Leaking fluid: If the power steering seal is damaged or worn out, fluid may leak from the system, leading to a low fluid level.

2. Whining or groaning noises: If the power steering pump is low on fluid, it can produce a whining or groaning noise when you turn the steering wheel.

3. Stiff steering: If the power steering system is low on fluid or the pump is damaged, the steering may feel stiff and difficult to turn.

4. Fluid contamination: If the power steering seal is damaged, dirt and debris can enter the system and cause damage to other components.

5. Power steering failure: If the power steering seal is severely damaged, the system may fail completely, making it difficult or impossible to steer the vehicle.

It's important to note that these symptoms can also be caused by other issues, so it's always best to have a qualified mechanic diagnose the problem and make repairs as necessary.