Which of the following is NOT a listed cause of power steering failure?

• A. Engine dies
• B. Worn tires
• C. Power steering fluid is low
• D. Drive belt breaks

Answer: (B)

The main idea is how power steering can fail. The system uses a hydraulic pump driven by the engine (via a drive belt) to provide assist as you steer. If the engine dies, the pump stops and steering loses its assist. If the power steering fluid is low, the pump can’t generate enough pressure, making steering feel heavy or unassisted. If the drive belt breaks, the pump is no longer driven, producing the same loss of assist as if the engine were off.

Worn tires don’t directly affect the power steering pump or hydraulics. They influence how the steering feels through grip and suspension, but they don’t cause the hydraulic system to fail or stop providing assist. That’s why worn tires aren’t listed as a cause of power steering failure.