P0553: Power Steering Pressure Sensor Circuit High Input

What does P0553 mean?

P0553 is a diagnostic trouble code indicating "Power Steering Pressure Sensor Circuit High Input". The ECU is reading a voltage that is above the expected range. This can be caused by a short to power in the wiring, a failed sensor, or a connector issue in the idle control.

Symptoms you may notice

• Check engine light (MIL) illuminated on dashboard
• Intermittent warning lights
• Erratic gauge readings

Common causes

• Damaged or corroded wiring harness
• Loose or disconnected electrical connector
• Failed idle control sensor or actuator
• Blown fuse in the related circuit
• Poor ground connection

What should you do?

This code sits in the steering system. Power assistance can cut out without warning, which makes the wheel go heavy, usually worst at parking and low speeds. Steering itself does not disappear, but the effort changes suddenly. Get it diagnosed before driving.