Engine-CodesMercury – P1550 Mercury

P1550 Mercury Code - Power Steering Pressure Sensor Malfunction

Quick Answer

The P1550 diagnostic trouble code (DTC) for Mercury vehicles indicates a malfunction in the power steering pressure sensor. Common causes include Faulty power steering pressure sensor, Wiring or electrical issues in the power steering sensor circuit, Low power steering fluid levels. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

What it means
P1550 Mercury indicates Power Steering Pressure Sensor Malfunction.
Common causes
Common causes include Faulty power steering pressure sensor, Wiring or electrical issues in the power steering sensor circuit, Low power steering fluid levels.
Severity
Moderate - service should be scheduled soon.
Can I drive?
The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
Table of contents Created and updated by William Orellana on Aug 25, 2024
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Code P1550 Mercury Description

The P1550 diagnostic trouble code (DTC) for Mercury vehicles indicates a malfunction in the power steering pressure sensor. The power steering pressure sensor is a crucial component of the power steering system, as it monitors the pressure within the system and sends signals to the vehicle's onboard computer to assist in adjusting the power steering operation. When this sensor malfunctions, it can lead to issues with the power steering system, affecting the vehicle's handling and overall performance.

OBDII Code P1550 Mercury - Power Steering Pressure Sensor Malfunction
P1550 Mercury Code - Power Steering Pressure Sensor Malfunction

Common Causes of P1550 Mercury

  1. Faulty power steering pressure sensor
  2. Wiring or electrical issues in the power steering sensor circuit
  3. Low power steering fluid levels
  4. Contamination or debris in the power steering system
  5. Issues with the power steering pump

Symptoms of P1550 Mercury

  1. Stiff or heavy steering feel
  2. Difficulty turning the steering wheel, especially at low speeds
  3. Inconsistent power steering assistance
  4. Unusual noises when turning the steering wheel
  5. Check engine light illuminated on the dashboard

How to Fix P1550 Mercury

  1. Begin by diagnosing the specific cause of the power steering pressure sensor malfunction using a diagnostic scanner.
  2. Inspect the power steering pressure sensor and associated wiring for any visible damage or corrosion.
  3. Check power steering fluid levels and top up if necessary.
  4. Clear the DTC and reset the system to see if the issue recurs.
  5. Replace the power steering pressure sensor if it is found to be faulty, and ensure proper calibration and testing of the new sensor.

Cost to Fix P1550 Mercury

The cost of repairing a power steering pressure sensor malfunction can vary depending on the specific cause of the issue and the cost of parts and labor in your area. On average, the repair cost for this type of problem can range from $150 to $500, including parts and labor. It's important to note that diagnostic time and labor rates at auto repair shops can fluctuate, so it's recommended to get quotes from multiple sources to ensure a fair price.

When is the Code Detected?

The Powertrain Control Module (PCM) has detected the Power Steering Pressure (PSP) input has fallen out of expected range.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

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