WOMS
P code powertrain Medium severity

P0555 Power Steering Pressure Sensor Circuit Malfunction

The OBD2 code P0555 indicates a malfunction in the power steering pressure sensor circuit, which may affect the vehicle's power steering system performance

Definition

The OBD2 code P0555 indicates a malfunction in the power steering pressure sensor circuit, which may affect the vehicle's power steering system performance

Common causes

  • Faulty power steering pressure sensor
  • Damaged wiring or connectors
  • Short circuit in the sensor circuit
  • Open circuit in the sensor circuit
  • Low power steering fluid level
  • Contaminated power steering fluid
  • Faulty power steering pump
  • Malfunctioning engine control module (ECM)

Common misdiagnoses

  • Power steering pump failure
  • Power steering fluid leak
  • Steering rack issues
  • Electrical wiring problems
  • Faulty power steering control module
  • Low power steering fluid level
  • Engine control module (ECM) issues
  • Sensor connector problems
  • Other sensor malfunctions
  • Incorrectly diagnosed steering system noise

Troubleshooting steps

  1. 1. Check for Additional Codes

    Use an OBD-II scanner to check for any other trouble codes that may be present. This can provide additional context for the problem

  2. 2. Inspect the Power Steering Fluid

    Ensure that the power steering fluid is at the correct level and is in good condition. Low fluid levels or contaminated fluid can affect the performance of the power steering system

  3. 3. Visual Inspection

  4. 4. Inspect the wiring and connectors related to the power steering pressure sensor for any signs of damage, corrosion, or loose connections

  5. 5. Look for any frayed wires or broken connectors that could cause an intermittent signal

  6. 6. Test the Power Steering Pressure Sensor

  7. 7. Use a multimeter to check the resistance of the power steering pressure sensor. Compare the readings to the specifications provided in the vehicle's service manual

  8. 8. If the sensor is faulty, it may need to be replaced

  9. 9. Check the Power Steering Pump

    Ensure that the power steering pump is functioning correctly. A failing pump can lead to incorrect pressure readings and trigger the P0555 code

  10. 10. Inspect the Power Steering Pressure Sensor Circuit

  11. 11. Check for continuity in the wiring between the sensor and the engine control module (ECM)

  12. 12. Look for any shorts to ground or open circuits that could affect the sensor's operation

  13. 13. Clear the Code and Test Drive

    After performing any repairs or replacements, clear the trouble code using the OBD-II scanner and take the vehicle for a test drive to see if the code returns

  14. 14. Consult a Professional

    If the issue persists after performing these steps, it may be necessary to consult a professional mechanic or technician for further diagnosis. They may have specialized tools and knowledge to identify more complex issues. By following these troubleshooting steps, you can systematically identify and resolve the cause of the P0555 code