P0553

Universal

Power Steering Pressure Sensor Circuit High Input

Definition source: General OBD-II reference catalog
Definition verification: Not independently verified for display.
Time: Varies by diagnosis and vehicle | Diagnostic difficulty: Medium
Medium Severity

The power steering pressure sensor reports pressure-related information to the vehicle’s control system, which may use it to adjust engine operation when steering load changes. P0553 means the sensor circuit is reporting an electrical input higher than expected. It does not by itself prove that steering pressure is too high or that the sensor needs replacement.

Report an error with this code

⚠️ Before You Begin (Safety First)

If steering suddenly becomes difficult, feels unpredictable, or a steering warning appears, pull over somewhere safe and arrange an inspection. Avoid driving if you cannot steer reliably. Do not loosen or open power-steering hydraulic lines during electrical checks.

Common Symptoms

  • The check-engine light may be on; some vehicles may also display a steering-related warning.
  • Engine idle may change or become less stable during steering maneuvers if the control system is not receiving usable pressure information.
  • Steering effort may feel different on some vehicles, but this code alone does not establish that power-steering assist has failed.
  • There may be no noticeable symptoms beyond the stored code.

Common Causes

  • A faulty power steering pressure sensor may produce an abnormally high electrical signal.
  • Damaged wiring or a connector problem may cause the signal circuit to be shorted to voltage or otherwise read high.
  • A poor circuit ground or a power-supply or wiring fault may distort the sensor signal.
  • A control-module fault is possible but should be considered only after the sensor and its circuits are tested.

Diagnostic Steps

  1. Check for other stored codes and note any symptoms; related codes can help identify whether the fault involves a wider electrical or engine-control issue.
  2. With the vehicle safely parked and the engine off, visually inspect accessible sensor wiring and connectors for damage, corrosion, looseness, or contact with hot or moving parts.
  3. Check the vehicle’s owner information for steering-fluid or steering-system warnings, but do not open hydraulic lines or assume the code indicates a hydraulic pressure problem.
  4. If you have a compatible scan tool, record available sensor data and whether the code returns after clearing it, if clearing codes is appropriate for your vehicle.
  5. If the code returns or wiring damage is not obvious, have the circuit tested using the vehicle-specific wiring diagram and service information.

When to Call a Professional

A technician can check related codes and scan data, then test the sensor signal, wiring, connectors, power and ground against vehicle-specific service information. The circuit should be checked for a signal shorted high or other electrical fault before replacing the sensor; the control module is considered only after the rest of the circuit is evaluated.

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Commonly Asked Questions

Does P0553 mean power-steering pressure is too high?

Not necessarily. The code describes a high electrical input in the pressure-sensor circuit, not a confirmed high hydraulic pressure reading.

Does this code prove the pressure sensor needs replacement?

No. A sensor fault is one possibility, but wiring, connector, power, or ground problems can also make the circuit read high.

Can I keep driving with P0553?

If steering feels normal and the vehicle has no other serious symptoms, the code alone does not establish that steering assist has failed. Arrange diagnosis soon, and stop safely if steering becomes difficult or unpredictable.

Why might engine idle be affected?

Some control systems use pressure-sensor information to account for engine load during steering. If that information is unreliable, idle behavior may be affected, depending on the vehicle.

Browse Available Code Guides

Previous and next available guides in database record order, across makes. Adjacent entries may share a code number and do not necessarily describe related faults.