AutoCodes – Buick – C0282 Buick

C0282 Buick Code - Medium Pressure Accumulator Switch Remains Closed

Quick Answer

The Brake Pressure Modulator Valve (BPMV) contains a Medium Pressure Accumulator (MPA). Common causes include Faulty Brake Pressure Modulator Valve (BPMV), Brake Pressure Modulator Valve (BPMV) harness is open or shorted, Brake Pressure Modulator Valve (BPMV) 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: C0282 Buick indicates Medium Pressure Accumulator Switch Remains Closed.
Common causes: Common causes include Faulty Brake Pressure Modulator Valve (BPMV), Brake Pressure Modulator Valve (BPMV) harness is open or shorted, Brake Pressure Modulator Valve (BPMV) 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 903

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 Jun 12, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C0282 Buick Description

The Brake Pressure Modulator Valve (BPMV) contains a Medium Pressure Accumulator (MPA). The MPA provides pressure to the front brakes during certain VSES events. The MPA switch is included to monitor the status of the pressure accumulator. The MPA switch is open when the MPA is uncharged.
The integrity of the MPA switch is tested by the Electronic Brake Control Module (EBCM). The MPA is partially discharged during system initialization to open the switch and then recharged to close the switch. The EBCM continues to monitor the switch to ensure the MPA remains charged. Provided the VSES is not activated, the MPA should remain charged for the entire ignition cycle. If the MPA switch opens within 5 minutes of closing, a fast leak down condition is detected. If the MPA switch opens after 5 minutes has passed, a slow leak down condition is detected.

OBDII Code C0282 Buick - Medium Pressure Accumulator Switch Remains Closed - AutoCodes.com — C0282 Buick Code - Medium Pressure Accumulator Switch Remains Closed

What does this mean?

What are the Possible Causes of the DTC C0282 Buick?

Faulty Brake Pressure Modulator Valve (BPMV)
Brake Pressure Modulator Valve (BPMV) harness is open or shorted
Brake Pressure Modulator Valve (BPMV) circuit poor electrical connection

How to Fix the DTC C0282 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 C0282 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 C0282 Buick Code

1. What does the OBDII code C0282 mean on a Buick?

C0282 indicates that the Medium Pressure Accumulator Switch in the vehicle's braking system is stuck in the closed position, which may affect the functionality of the electronic brake control module (EBCM).

2. What are common symptoms of the C0282 code on a Buick?

Symptoms may include the ABS warning light turning on, reduced braking performance, or the ABS system failing to engage properly.

3. What causes the C0282 code to appear?

Common causes include a faulty medium pressure accumulator switch, wiring or connector issues, or a malfunctioning electronic brake control module (EBCM).

4. Can the C0282 code affect vehicle safety?

Yes, since it impacts the ABS system, it could compromise braking performance during emergency stops or slippery conditions.

5. How do you diagnose the C0282 code on a Buick?

Diagnosis involves scanning the vehicle with an OBDII scanner, inspecting the accumulator switch, checking for damaged wiring or connectors, and testing the EBCM for proper operation.

6. Is it safe to drive with the C0282 code active?

While the vehicle may still be drivable, it's not recommended due to potential issues with the ABS system, which could affect braking reliability.

7. How is the C0282 code typically fixed?

Repairs may include replacing the medium pressure accumulator switch, repairing or replacing damaged wiring or connectors, or reprogramming or replacing the EBCM if necessary.

8. How much does it cost to fix the C0282 code on a Buick?

The repair cost can vary widely, from $100 to $500 or more, depending on whether the issue is with the switch, wiring, or EBCM.

9. Can a low brake fluid level trigger the C0282 code?

Low brake fluid itself is unlikely to trigger this specific code, but itâ€™s essential to check the fluid level as part of diagnosing braking system issues.

10. Do I need a mechanic to fix the C0282 code?

While some experienced DIYers may handle basic repairs like replacing a switch, diagnosing and repairing an ABS-related issue often requires specialized tools and expertise, so consulting a mechanic is recommended.