AutoCodes – Generic – C1449

C1449 Code - Master Cylinder Output Value Malfunction

Quick Answer

The Master Cylinder Pressure Sensor is connected to the Skid Control ECU (Brake Actuator Assembly). Common causes include Faulty Brake Actuator Assembly (Master Cylinder Pressure Sensor), Brake Actuator Assembly harness is open or shorted, Brake Actuator Assembly circuit poor electrical connection. 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: C1449 indicates Master Cylinder Output Value Malfunction.
Common causes: Common causes include Faulty Brake Actuator Assembly (Master Cylinder Pressure Sensor), Brake Actuator Assembly harness is open or shorted, Brake Actuator Assembly circuit poor electrical connection.
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 5,324

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 Jan 29, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C1449 Description

The Master Cylinder Pressure Sensor is connected to the Skid Control ECU (Brake Actuator Assembly). The Skid Control ECU monitors the Master Cylinder Pressure Sensor. The Skid Control ECU sets the Diagnostic Trouble Code (DTC) when the Master Cylinder Pressure Sensor is not to factory specifications.

OBDII Code C1449 - Master Cylinder Output Value Malfunction - AutoCodes.com — C1449 Code - Master Cylinder Output Value Malfunction

What does this mean?

What are the Possible Causes of the DTC C1449?

Faulty Brake Actuator Assembly (Master Cylinder Pressure Sensor)
Brake Actuator Assembly harness is open or shorted
Brake Actuator Assembly circuit poor electrical connection

How to Fix the DTC C1449?

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 C1449 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 C1449 code?

Need more information on how to fix the C1449 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C1449 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

C1449 Lexus — Master Cylinder Output Value Malfunction
C1449 Scion — Master Cylinder Output Value Malfunction
C1449 Toyota — Master Cylinder Output Value Malfunction

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 C1449 Code

1. What are the common symptoms of OBDII code C1449 (Master Cylinder Output Value Malfunction)?

- Common symptoms include a spongy or soft brake pedal, decreased brake performance, and the illumination of the ABS warning light on the dashboard.

2. What are the possible causes of OBDII code C1449?

- The code C1449 can be triggered by issues such as a faulty master cylinder, damaged brake lines, air in the brake system, or malfunctioning ABS components.

3. How can I diagnose the cause of OBDII code C1449?

- To diagnose the cause of code C1449, it is recommended to inspect the brake system components, check for leaks, test the master cylinder output value, and scan for other related trouble codes.

4. Can I drive my vehicle with OBDII code C1449?

- It is not recommended to drive your vehicle with code C1449 as it can affect the braking performance and compromise safety. Have the issue diagnosed and repaired as soon as possible.

5. How can I repair OBDII code C1449?

- Repairing code C1449 involves addressing the root cause of the malfunction, which may include replacing the master cylinder, repairing brake lines, bleeding the brake system, or fixing ABS components as needed.

6. Is it safe to continue driving if the ABS warning light is on due to code C1449?

- It is not safe to drive with the ABS warning light on, as it indicates a potential issue with the braking system. Have the vehicle inspected by a qualified technician to determine the cause and ensure safe operation.

7. Can code C1449 be reset without fixing the underlying issue?

- Resetting the code without fixing the underlying issue will only temporarily clear the warning light. The code is likely to reappear until the root cause is addressed.

8. How much does it cost to repair OBDII code C1449?

- The cost of repairing code C1449 can vary depending on the specific cause of the malfunction, parts needed for replacement, and labor charges. It is recommended to consult a professional for an accurate estimate.

9. Will OBDII code C1449 cause the vehicle to fail an emissions test?

- Code C1449 is related to the brake system and is not directly linked to emissions. However, it is important to address the issue promptly to ensure the vehicle is in proper working condition.

10. Can a DIY enthusiast repair OBDII code C1449 at home?

- Repairing code C1449 may require specialized tools and knowledge of brake systems. While some DIY enthusiasts may be able to address simpler causes like bleeding the brake system, more complex issues may require professional assistance.