Engine-CodesMercury – C1477 Mercury

C1477 Mercury Code - High Pressure Hydraulic Circuit Leakage Plausibility Failure

Quick Answer

The C1477 diagnostic trouble code (DTC) for Mercury vehicles indicates a High Pressure Hydraulic Circuit Leakage Plausibility Failure. Common causes include Damaged or corroded brake lines, Worn-out seals or gaskets in the hydraulic system, Malfunctioning hydraulic pump. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
C1477 Mercury indicates High Pressure Hydraulic Circuit Leakage Plausibility Failure.
Common causes
Common causes include Damaged or corroded brake lines, Worn-out seals or gaskets in the hydraulic system, Malfunctioning hydraulic pump.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Table of contents Created and updated by William Orellana on Sep 14, 2024
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Code C1477 Mercury Description

The C1477 diagnostic trouble code (DTC) for Mercury vehicles indicates a High Pressure Hydraulic Circuit Leakage Plausibility Failure. This code is typically associated with the vehicle's hydraulic braking system, specifically the high-pressure circuit that is responsible for transmitting hydraulic fluid to the brake calipers. When this code is triggered, it means that the vehicle's onboard computer has detected a discrepancy between the expected and actual pressure levels in the hydraulic circuit, suggesting a potential leak or malfunction in the system.

OBDII Code C1477 Mercury - High Pressure Hydraulic Circuit Leakage Plausibility Failure
C1477 Mercury Code - High Pressure Hydraulic Circuit Leakage Plausibility Failure

Common Causes of C1477 Mercury

  1. Damaged or corroded brake lines.
  2. Worn-out seals or gaskets in the hydraulic system.
  3. Malfunctioning hydraulic pump.
  4. Faulty hydraulic control unit.
  5. Improper installation of brake components.

Symptoms of C1477 Mercury

  1. Illumination of the brake warning light on the dashboard.
  2. Soft or spongy brake pedal feel.
  3. Increased stopping distances.
  4. Brake fluid leaks under the vehicle.
  5. Unusual noises or vibrations when applying the brakes.

How to Fix C1477 Mercury

  1. Perform a visual inspection of the brake system to identify any visible leaks or damage.
  2. Use a pressure gauge to test the hydraulic pressure in the system and pinpoint the source of the leakage.
  3. Replace any damaged brake lines, seals, or gaskets as needed.
  4. Inspect and repair or replace the hydraulic pump or control unit if found to be faulty.
  5. Bleed the brake system to remove any air bubbles and ensure proper hydraulic pressure.

Cost to Fix C1477 Mercury

The typical repair costs for addressing a high-pressure hydraulic circuit leakage plausibility failure can range from $200 to $800, depending on the extent of the damage and the specific components that need to be replaced. This estimate includes the cost of parts such as brake lines, seals, gaskets, hydraulic pump, and labor charges for the repair process. It's important to note that the actual repair costs may vary based on factors such as the vehicle's make and model, the severity of the issue, and the rates charged by auto repair shops in your area. It's recommended to obtain multiple quotes from reputable repair facilities to ensure a fair and accurate estimate for the repair.

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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.

Frequently Asked Questions about C1477 Mercury Code

1. What are the common symptoms of OBDII code C1477 in a Mercury?

- Common symptoms include a loss of power steering assist, illuminated warning lights on the dashboard, and difficulty steering.

2. What causes the OBDII code C1477 to occur in a Mercury?

- The code is typically triggered by a high-pressure hydraulic circuit leakage, which can be caused by damaged power steering hoses, seals, or components.

3. How serious is the High Pressure Hydraulic Circuit Leakage Plausibility Failure in a Mercury?

- This issue is serious as it can lead to a sudden loss of power steering functionality, making it challenging to control the vehicle safely.

4. Can I still drive my Mercury with the C1477 code present?

- It is not recommended to drive the vehicle with this code present, as it can compromise your ability to steer the car effectively.

5. How can I diagnose the source of the high-pressure hydraulic circuit leakage in my Mercury?

- A thorough visual inspection of the power steering system, including hoses, connections, and components, is essential to identify the source of the leakage.

6. What are some repair tips for fixing the High Pressure Hydraulic Circuit Leakage in a Mercury?

- Repair tips may include replacing damaged power steering components, such as hoses or seals, and ensuring all connections are secure to prevent further leakage.

7. Is it possible to clear the C1477 code in a Mercury without fixing the issue?

- Clearing the code without addressing the underlying problem will only result in the code reappearing once the system detects the issue again.

8. How much does it typically cost to repair a High Pressure Hydraulic Circuit Leakage in a Mercury?

- The cost of repairing this issue can vary depending on the extent of the damage and the specific components that need to be replaced. It is recommended to consult a mechanic for an accurate estimate.

9. Can I prevent the occurrence of the C1477 code in my Mercury?

- Regular maintenance of the power steering system, including checking for leaks and ensuring proper fluid levels, can help prevent the occurrence of the high-pressure hydraulic circuit leakage.

10. Is it safe to attempt to fix the High Pressure Hydraulic Circuit Leakage issue in my Mercury myself?

- Due to the complexity of the power steering system and the importance of proper repairs, it is recommended to have a qualified mechanic address the issue to ensure safety and effectiveness.

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