P0550 Fault Code

Power Steering Pressure Sensor Circuit Malfunction

• What does that mean?
• Symptoms
• Causes
• Solutions

The P0550 fault code refers to an issue within the power steering pressure sensor circuit. This sensor is crucial for monitoring the hydraulic pressure within the power steering system, helping the vehicle adjust steering effort based on the conditions. When this circuit malfunctions, it can lead to poor steering performance and increased driver effort.

What are the symptoms of the P0550 code?

Symptoms associated with the P0550 error may include:

• Difficult steering, especially at low speeds.
• Excessive steering effort required to maneuver the vehicle.
• Illuminated check engine light on the dashboard.
• Erratic power steering assistance, where the system may feel overly sensitive or unresponsive.
• Potential noise coming from the power steering pump or system.

What causes the P0550 code?

Common causes of the P0550 code include:

• A faulty power steering pressure sensor.
• Damaged wiring or connectors in the sensor circuit.
• A malfunctioning power steering pump that does not generate the appropriate pressure.
• Low power steering fluid levels or contaminated fluid.
• Faulty engine control module (ECM) that fails to interpret signals from the sensor correctly.

How to fix P0550?

To resolve the P0550 code, follow these steps:

1. Start by checking the power steering fluid level and quality; top off or replace it if necessary.
2. Inspect the power steering pressure sensor wiring and connectors for any signs of damage or corrosion.
3. Test the power steering pressure sensor using a multimeter to verify its operation; replace it if found faulty.
4. Ensure the power steering pump is functioning correctly and generating the right pressure.
5. Clear the fault codes and take the vehicle for a test drive, observing if the issue persists.