AutoCodes – Generic – C0074

C0074 Code - Master Cylinder Pressure Sensor Output

Quick Answer

The Anti-Lock Brake System (ABS) Module monitors the Master Cylinder Pressure Sensor. Common causes include Faulty Master Cylinder Pressure Sensor, Master Cylinder Pressure Sensor harness is open or shorted, Master Cylinder Pressure Sensor 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: C0074 indicates Master Cylinder Pressure Sensor Output.
Common causes: Common causes include Faulty Master Cylinder Pressure Sensor, Master Cylinder Pressure Sensor harness is open or shorted, Master Cylinder Pressure Sensor 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 13,482

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 May 04, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C0074 Description

The Anti-Lock Brake System (ABS) Module monitors the Master Cylinder Pressure Sensor. The ABS Module sets the OBDII code when the Master Cylinder Pressure Sensor is not to factory specifications.

OBDII Code C0074 - Master Cylinder Pressure Sensor Output - AutoCodes.com — C0074 Code - Master Cylinder Pressure Sensor Output

What does this mean?

What are the Possible Causes of the DTC C0074?

Faulty Master Cylinder Pressure Sensor
Master Cylinder Pressure Sensor harness is open or shorted
Master Cylinder Pressure Sensor circuit poor electrical connection

How to Fix the DTC C0074?

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 C0074 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 C0074 code?

Need more information on how to fix the C0074 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C0074 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

C0074 Subaru — Master Cylinder Pressure Sensor Output

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 C0074 Code

1. What are the common symptoms of OBDII code C0074 related to the Master Cylinder Pressure Sensor Output?

The common symptoms of OBDII code C0074 include an illuminated check engine light, spongy brake pedal feel, and potential loss of brake function.

2. What are the possible causes of OBDII code C0074?

Possible causes of OBDII code C0074 include a faulty master cylinder pressure sensor, damaged wiring or connectors in the sensor circuit, or issues with the brake system's hydraulic control unit.

3. How can I diagnose OBDII code C0074 related to the Master Cylinder Pressure Sensor Output?

Diagnosis of OBDII code C0074 involves using a scan tool to read the code, inspecting the master cylinder pressure sensor and its wiring, and performing a brake system pressure test to identify any abnormalities.

4. Can I continue driving with OBDII code C0074 present?

It is not recommended to continue driving with OBDII code C0074 present, as it may lead to brake system malfunctions and compromise vehicle safety. Immediate attention and repair are advised.

5. What are the repair options for addressing OBDII code C0074?

Repair options for OBDII code C0074 may include replacing the faulty master cylinder pressure sensor, repairing damaged wiring or connectors, or addressing any issues with the hydraulic control unit in the brake system.

6. How critical is it to address OBDII code C0074 promptly?

It is crucial to address OBDII code C0074 promptly to ensure the safe operation of the vehicle's brake system. Ignoring this code can lead to brake failure and pose a significant safety risk.

7. Are there any DIY repair tips for OBDII code C0074?

DIY repair for OBDII code C0074 may be challenging due to the complexity of the brake system. It is recommended to seek assistance from a qualified mechanic or automotive technician for proper diagnosis and repair.

8. Can weather conditions affect the occurrence of OBDII code C0074?

Extreme weather conditions, such as temperature fluctuations or moisture exposure, can potentially impact the master cylinder pressure sensor's performance and trigger OBDII code C0074.

9. How much can I expect to pay for repairs related to OBDII code C0074?

The cost of repairs for OBDII code C0074 can vary depending on the specific issue and the labor rates of the repair shop. It is advisable to obtain quotes from multiple service providers for comparison.

10. Will resetting the OBDII system clear OBDII code C0074?

Resetting the OBDII system may temporarily clear OBDII code C0074, but the underlying issue causing the code will persist. It is essential to diagnose and address the root cause of the problem for a lasting solution.