The power steering pressure switch is used to:

The power steering pressure switch plays a crucial role in enhancing the vehicle's steering response, particularly during turns. When a driver initiates a turn, the steering system experiences increased resistance because of the angle and load placed on the steering components. The power steering pressure switch detects this higher demand for assistance and activates the power steering pump to increase hydraulic pressure. This additional pressure allows for easier steering, making the maneuver more comfortable and reducing the effort needed from the driver to turn the steering wheel.

By providing more assistance when turning, the power steering system not only improves handling but also helps to maintain control of the vehicle. This responsiveness is particularly important in tight turns or during low-speed maneuvers, where driver input is critical for safe navigation.

The other options do not accurately describe the primary function of the power steering pressure switch. Options related to stalling address engine performance or idle conditions, which are not directly related to the power steering system's operations. Thus, the correct answer emphasizes the switch's role in managing steering assistance during steering maneuvers, ensuring that drivers have optimal control and comfort while navigating turns.