AutoCodes – Generic – C0047

C0047 Code - Brake Booster Pressure Sensor

Quick Answer

The Anti-Lock Brake System (ABS) Module monitors the Brake Booster Pressure Sensor. Common causes include Faulty Brake Booster Pressure Sensor, Brake Booster Pressure Sensor harness is open or shorted, Brake Booster 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: C0047 indicates Brake Booster Pressure Sensor.
Common causes: Common causes include Faulty Brake Booster Pressure Sensor, Brake Booster Pressure Sensor harness is open or shorted, Brake Booster 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 26,622

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 02, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C0047 Description

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

OBDII Code C0047 - Brake Booster Pressure Sensor - AutoCodes.com — C0047 Code - Brake Booster Pressure Sensor

What does this mean?

What are the Possible Causes of the DTC C0047?

Faulty Brake Booster Pressure Sensor
Brake Booster Pressure Sensor harness is open or shorted
Brake Booster Pressure Sensor circuit poor electrical connection

How to Fix the DTC C0047?

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 C0047 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 C0047 code?

Need more information on how to fix the C0047 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C0047 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

C0047 Buick — Left Rear Wheel Speed Sensor Circuit Low
C0047 Cadillac — Left Rear Wheel Speed Sensor Circuit Low
C0047 Chevrolet — Left Rear Wheel Speed Sensor Circuit Low
C0047 GMC — Left Rear Wheel Speed Sensor Circuit Low

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 C0047 Code

1. What are the common symptoms of OBDII code C0047 related to the Brake Booster Pressure Sensor?

- Common symptoms include a spongy brake pedal, decreased brake assist, and the illumination of the ABS or traction control warning lights.

2. What are the possible causes of OBDII code C0047 for the Brake Booster Pressure Sensor?

- Potential causes may include a faulty brake booster pressure sensor, damaged wiring or connectors, low brake fluid levels, or a malfunctioning ABS module.

3. How can I diagnose OBDII code C0047 associated with the Brake Booster Pressure Sensor?

- Diagnosis typically involves using a scan tool to read the code, conducting a visual inspection of the sensor and its connections, and performing testing on the sensor's operation.

4. Can I drive my vehicle with OBDII code C0047 related to the Brake Booster Pressure Sensor?

- It is not recommended to drive the vehicle with this code present, as it can affect the performance of the braking system and compromise safety.

5. How can I repair OBDII code C0047 for the Brake Booster Pressure Sensor?

- Repair may involve replacing the brake booster pressure sensor, repairing damaged wiring or connectors, ensuring proper brake fluid levels, and resetting the trouble code with a scan tool.

6. Are there any DIY tips for troubleshooting OBDII code C0047 associated with the Brake Booster Pressure Sensor?

- DIY tips include checking the brake fluid level, inspecting the sensor and its connections for any visible damage, and ensuring the brake booster is functioning correctly.

7. What is the role of the Brake Booster Pressure Sensor in the braking system?

- The Brake Booster Pressure Sensor monitors the pressure within the brake booster to assist in providing power brake assistance and ensuring optimal braking performance.

8. How critical is it to address OBDII code C0047 for the Brake Booster Pressure Sensor promptly?

- It is crucial to address this code promptly as it directly impacts the functionality of the braking system and can compromise the safety of the vehicle.

9. Can weather or environmental factors trigger OBDII code C0047 related to the Brake Booster Pressure Sensor?

- Extreme weather conditions or exposure to moisture can potentially affect the operation of the Brake Booster Pressure Sensor and lead to the triggering of this OBDII code.

10. Is it necessary to reset the system after repairing OBDII code C0047 for the Brake Booster Pressure Sensor?

- Yes, it is recommended to reset the system using a scan tool after repairing the issue to clear the trouble code and ensure proper functionality of the braking system.