AutoCodes – Buick – C120A Buick

C120A Buick Code - ABS Pump Pressure Performance

Quick Answer

The Electronic Brake Control Module (EBCM) uses input from the boost pressure sensor for more accurate control during brake and vehicle stability enhancement system event. Common causes include Faulty Brake Pressure Modulator, Brake Pressure Modulator harness is open or shorted, Brake Pressure Modulator 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: C120A Buick indicates ABS Pump Pressure Performance.
Common causes: Common causes include Faulty Brake Pressure Modulator, Brake Pressure Modulator harness is open or shorted, Brake Pressure Modulator 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 924

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 07, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C120A Buick Description

The Electronic Brake Control Module (EBCM) uses input from the boost pressure sensor for more accurate control during brake and vehicle stability enhancement system event. The boost pressure sensor is internal to the brake pressure modulator.

OBDII Code C120A Buick - ABS Pump Pressure Performance - AutoCodes.com — C120A Buick Code - ABS Pump Pressure Performance

What does this mean?

What are the Possible Causes of the DTC C120A Buick?

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

How to Fix the DTC C120A Buick?

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 C120A Buick 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.

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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 C120A Buick Code

1. What are the common symptoms of OBDII code C120A Buick (ABS Pump Pressure Performance)?

- Common symptoms include the ABS warning light being illuminated on the dashboard, loss of ABS functionality, and potential issues with braking performance.

2. What are the possible causes of OBDII code C120A Buick (ABS Pump Pressure Performance)?

- Possible causes can include a malfunctioning ABS pump, low brake fluid levels, air in the brake system, or a faulty ABS module.

3. How can I diagnose the OBDII code C120A Buick (ABS Pump Pressure Performance)?

- Diagnosis typically involves using a professional OBDII scanner to read the code, conducting a visual inspection of the brake system components, and performing tests to pinpoint the issue.

4. Can I still drive my Buick with OBDII code C120A (ABS Pump Pressure Performance)?

- It is not recommended to drive the vehicle with the ABS warning light on, as this indicates a potential issue with the anti-lock braking system that could compromise safety.

5. How can I repair OBDII code C120A Buick (ABS Pump Pressure Performance)?

- Repair methods may include checking and refilling brake fluid, bleeding the brake system, replacing the ABS pump or module, or addressing any other identified component failures.

6. Is it safe to continue driving if the ABS warning light is off after the OBDII code C120A Buick (ABS Pump Pressure Performance) has been cleared?

- It is still advisable to have the vehicle inspected by a professional even if the warning light is off, as there may still be underlying issues that need to be addressed to ensure safe braking performance.

7. Can weather conditions affect the triggering of OBDII code C120A Buick (ABS Pump Pressure Performance)?

- Extreme weather conditions such as prolonged exposure to high heat or cold can potentially contribute to ABS system malfunctions, leading to the triggering of this OBDII code.

8. How much does it typically cost to repair OBDII code C120A Buick (ABS Pump Pressure Performance)?

- The cost of repairs can vary depending on the specific issue causing the code, but it is advisable to budget for potential expenses related to replacing components or conducting diagnostic tests.

9. Are there any preventative maintenance measures to help prevent OBDII code C120A Buick (ABS Pump Pressure Performance)?

- Regular brake system inspections, timely fluid changes, and addressing any unusual noises or behaviors in the braking system can help prevent issues that may trigger this OBDII code.

10. Can I reset the OBDII code C120A Buick (ABS Pump Pressure Performance) on my own?

- While you can clear the code using an OBDII scanner, it is important to address the underlying cause of the issue to prevent the code from reoccurring.