AutoCodes – Lincoln – C1477 Lincoln

C1477 Lincoln Code - High Pressure Hydraulic Circuit Leakage Plausibility Failure

Quick Answer

The Hydraulic Control Unit (HCU) monitors the High Pressure Hydraulic Circuit. Common causes include Brake System Bleeding, Faulty Hydraulic Control Unit (HCU), Hydraulic Control Unit (HCU) harness is open or shorted. 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 Lincoln indicates High Pressure Hydraulic Circuit Leakage Plausibility Failure.
Common causes: Common causes include Brake System Bleeding, Faulty Hydraulic Control Unit (HCU), Hydraulic Control Unit (HCU) harness is open or shorted.
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.

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Code Popularity 786

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Oct 14, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C1477 Lincoln Description

The Hydraulic Control Unit (HCU) monitors the High Pressure Hydraulic Circuit. The HCU sets the OBDII code when the High Pressure Hydraulic Circuit is not to factory specifications.

OBDII Code C1477 Lincoln - High Pressure Hydraulic Circuit Leakage Plausibility Failure - AutoCodes.com — C1477 Lincoln Code - High Pressure Hydraulic Circuit Leakage Plausibility Failure

What does this mean?

What are the Possible Causes of the DTC C1477 Lincoln?

Brake System Bleeding
Faulty Hydraulic Control Unit (HCU)
Hydraulic Control Unit (HCU) harness is open or shorted
Hydraulic Control Unit (HCU) circuit poor electrical connection

How to Fix the DTC C1477 Lincoln?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the C1477 Lincoln code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the C1477 Lincoln code?

Need more information on how to fix the C1477 Lincoln code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C1477 Lincoln code diagnosed by a professional: Find a repair shop in your area

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 Lincoln Code

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

- Common symptoms include illuminated warning lights on the dashboard, loss of power steering assistance, and potential difficulty steering the vehicle.

2. What can cause the OBDII code C1477 in a Lincoln?

- The code C1477 is typically triggered by a high-pressure hydraulic circuit leakage plausibility failure, which can be caused by damaged power steering components or hydraulic system issues.

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

- This issue is considered serious as it can affect the proper functioning of the power steering system, potentially leading to safety concerns while driving.

4. What should I do if my Lincoln shows the OBDII code C1477?

- It is recommended to address the issue promptly by having the power steering system inspected by a qualified mechanic to determine the exact cause of the high-pressure hydraulic circuit leakage plausibility failure.

5. Can I continue driving my Lincoln with the OBDII code C1477?

- It is not advisable to continue driving the vehicle with this code present, as it can lead to unpredictable steering behavior and compromise driving safety.

6. How is the OBDII code C1477 in a Lincoln typically repaired?

- Repairs for code C1477 usually involve diagnosing the specific source of the leakage and addressing any damaged components in the power steering system, such as hoses, pumps, or seals.

7. Is it possible to reset the OBDII code C1477 in a Lincoln without fixing the issue?

- While resetting the code may temporarily turn off the warning light, it is crucial to address the root cause of the problem to prevent future safety risks and ensure proper vehicle operation.

8. Can extreme weather conditions contribute to the occurrence of the OBDII code C1477 in a Lincoln?

- Extreme temperatures or weather conditions can potentially exacerbate existing power steering system issues, leading to the triggering of code C1477.

9. How can regular maintenance help prevent the OBDII code C1477 in a Lincoln?

- Regular maintenance, including checking power steering fluid levels and inspecting the system for leaks, can help detect potential issues early and prevent the occurrence of code C1477.

10. Are there any DIY tips for troubleshooting the OBDII code C1477 in a Lincoln?

- While basic checks like inspecting power steering fluid levels and visible components for damage can be done at home, diagnosing and repairing the specific cause of code C1477 usually requires professional expertise and equipment.