The Chrysler PT Cruiser Power Steering Pressure Switch tells the engine computer to maintain a smooth idle when steering effort spikes. Connected to the high-pressure hose, the Power Steering Pressure Switch detects the rise in hydraulic force during tight low-speed maneuvers, closes its circuit, and the control module raises idle speed to prevent stalling. The Power Steering Pressure Switch on Chrysler PT Cruiser models uses a straightforward two-wire connector that has remained consistent across the lineup and a hydraulic-activated, normally open design. Whether early or late production, therefore, owners of Chrysler PT Cruisers see no significant styling alterations, just occasional tweaks to connector shapes that don't alter function. The Power Steering Pressure Switch is limited in that it does not modulate flow as your variable-assist electronics would. Instead, it only comes on when a preset pressure is achieved. This helps to keep the system rather inexpensive and reliable. Failures typically show as rough idle while parking or sudden engine stumble, yet replacement restores proper coordination between the pump load and the engine that every Chrysler PT Cruiser driver expects. An idle-control diagnostic code may also be triggered by a faulty Power Steering Pressure Switch.
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