P0553 Power Steering Pressure Sensor Circuit High Input

P0553 points to a high input from the power steering pressure sensor circuit. The pressure signal voltage is above the expected operating range.

Code details

Generic OBD-II · P0

System: Speed / Idle
Code type: Generic (SAE / ISO controlled)
Standard: SAE J2012 / ISO 15031-6

Diagnostic boundary

A diagnostic trouble code reports that a monitored test failed. It does not prove one specific part is bad, and manufacturer logic can add vehicle-specific conditions.

Do not ignore actual high steering load or hydraulic restriction while diagnosing a high sensor signal.

Symptoms of P0553

Unstable, high, or low idle, or stalling.
Erratic speedometer, cruise-control, or shift behaviour.
Check-engine light with a hesitation or surge.

Common causes of P0553

A dirty throttle body, idle-control valve, or throttle-position sensor.
A failing vehicle-speed or wheel-speed sensor, or its wiring.
Vacuum leaks or a related sensor forcing the idle/speed strategy.

Useful checks before replacing parts

Review pressure sensor voltage, reference voltage, ground integrity, steering load, idle response, freeze-frame data, and other high-input sensor codes.
Inspect for open grounds, short-to-voltage faults, connector corrosion, harness damage, steering hydraulic restriction, and true high pump load.
Compare readings with the steering centered and at load to separate a stuck-high signal from actual high pressure.

Related OBD-II codes

These nearby speed / idle entries can help compare wording and pin down the fault area.