AutoCodes – Generic – C1471

C1471 Code - Brake System Volume Consumption Plausibility Failure

Quick Answer

The Hydraulic Control Unit (HCU) monitors the Brake Master Cylinder. Common causes include Brake System Bleeding, Faulty Brake Master Cylinder, Faulty Hydraulic Control Unit (HCU). 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: C1471 indicates Brake System Volume Consumption Plausibility Failure.
Common causes: Common causes include Brake System Bleeding, Faulty Brake Master Cylinder, Faulty Hydraulic Control Unit (HCU).
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 2,286

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 12, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C1471 Description

The Hydraulic Control Unit (HCU) monitors the Brake Master Cylinder. The HCU sets the OBDII code when the Brake Master Cylinder is not to factory specifications.

OBDII Code C1471 - Brake System Volume Consumption Plausibility Failure - AutoCodes.com — C1471 Code - Brake System Volume Consumption Plausibility Failure

What does this mean?

What are the Possible Causes of the DTC C1471?

Brake System Bleeding
Faulty Brake Master Cylinder
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 C1471?

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 C1471 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 C1471 code?

Need more information on how to fix the C1471 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C1471 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

C1471 Ford — Brake System Volume Consumption Plausibility Failure
C1471 Lincoln — Brake System Volume Consumption Plausibility Failure
C1471 Mercury — Brake System Volume Consumption Plausibility Failure

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 C1471 Code

1. What are the common symptoms of OBDII code C1471 (Brake System Volume Consumption Plausibility Failure)?

The common symptoms include illuminated brake warning lights on the dashboard, reduced brake performance, and abnormal brake pedal feel.

2. What can cause the OBDII code C1471 to trigger?

The code C1471 can be triggered by issues such as low brake fluid level, brake fluid leaks, faulty brake master cylinder, or sensor malfunctions in the brake system.

3. How serious is the OBDII code C1471 (Brake System Volume Consumption Plausibility Failure)?

This code indicates a potential issue with the brake system's volume consumption, which can compromise the effectiveness of the brakes. It is important to address this problem promptly to ensure safe driving.

4. Can I continue driving with the OBDII code C1471 active?

It is not recommended to continue driving with the code C1471 active, as it may lead to brake system malfunctions and compromise your safety on the road. It is advisable to have the issue diagnosed and repaired as soon as possible.

5. How can I diagnose the OBDII code C1471?

Diagnosing the code C1471 typically involves inspecting the brake fluid level, checking for leaks in the brake system, and testing the brake master cylinder and related sensors for proper functionality.

6. What are some repair tips for addressing the OBDII code C1471?

Repair tips may include topping up the brake fluid, repairing any leaks in the brake system, replacing a faulty brake master cylinder, or addressing sensor issues in the brake system.

7. Can I reset the OBDII code C1471 without addressing the underlying issue?

Resetting the code without addressing the underlying issue will only temporarily clear the warning light. It is essential to diagnose and fix the root cause of the problem to prevent the code from reoccurring.

8. How much does it typically cost to repair the OBDII code C1471?

The cost of repairing the code C1471 can vary depending on the underlying issue, the extent of the repairs needed, and the labor rates of the repair shop. It is recommended to obtain quotes from different shops for an accurate estimate.

9. Is the OBDII code C1471 a common issue in certain vehicle makes or models?

The code C1471 can be more common in certain vehicle makes or models that are prone to brake system issues. It is advisable to check for any manufacturer recalls or technical service bulletins related to this code for specific vehicles.

10. How can regular brake system maintenance help prevent the occurrence of the OBDII code C1471?

Regular brake system maintenance, including checking brake fluid levels, inspecting for leaks, and replacing worn brake components, can help prevent issues like the OBDII code C1471 by ensuring the proper functioning of the brake system.