DTC codes / P05xx · Vehicle speed, idle control and auxiliary inputs / P0553
P0553 means the power steering pressure sensor or switch is reporting a voltage or signal that is higher than the computer expects for the current steering load. The engine control module (ECM) or power steering control module monitors this circuit and sets the code when the signal stays above the calibrated high threshold, indicating an open circuit, a short to voltage, or a faulty sensor.
Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.
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