P0551 Power Steering Pressure Sensor Circuit Range Performance

• OBD2 Code: P0551
• Description: Power Steering Pressure Sensor Circuit Range/Performance
• Definition: This code indicates that the power steering pressure sensor circuit is not operating within its expected range, which may affect the performance of the power steering system.

p0551 – Power Steering Pressure Sensor Circuit Range/Performance

Typical Severity: Moderate

Common Causes

P0551 – Power Steering Pressure Sensor Circuit Range/Performance

Common causes:

• Faulty power steering pressure sensor
• Low power steering fluid level
• Power steering pump failure
• Wiring or connector issues in the power steering pressure sensor circuit
• ECU (Engine Control Unit) software needs to be updated

 

Common Misdiagnosis

OBD2 Code: P0551

Description: Power Steering Pressure Sensor Circuit Range/Performance

Common Misdiagnosis: Replacing the power steering pump or pressure sensor without checking for wiring issues or fluid level problems.

 

Common Diagnostic Steps

OBD2 Code: P0551

Description: Power Steering Pressure Sensor Circuit Range/Performance

• Check for any power steering fluid leaks and ensure the fluid level is correct.
• Inspect the power steering pressure sensor wiring and connectors for damage or corrosion.
• Test the voltage signal from the power steering pressure sensor using a multimeter to ensure it is within specifications.
• Verify that the power steering pump is functioning properly and providing adequate pressure.
• Examine the condition of the serpentine belt to ensure it is not slipping or worn out.
• If equipped, use an OBD2 scanner to monitor live data from the power steering pressure sensor while turning the wheel to check for irregular readings.
• Replace the power steering pressure sensor if all other components are functioning correctly but the issue persists.