AutoCodes – Chevrolet – C0299 2015 Chevrolet Silverado

C0299 2015 Chevrolet Silverado Code - Brake Booster Large Vacuum Leak Detected

Quick Answer

The brake booster vacuum sensor measures the vacuum in the brake booster assembly. Common causes include Vacuum leak at the brake booster, Faulty Brake Booster Vacuum Sensor, Brake Booster Vacuum Sensor harness is open or shorted. 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: C0299 2015 Chevrolet Silverado indicates Brake Booster Large Vacuum Leak Detected.
Common causes: Common causes include Vacuum leak at the brake booster, Faulty Brake Booster Vacuum Sensor, Brake Booster Vacuum Sensor harness is open or shorted.
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 718

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Jul 05, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C0299 2015 Chevrolet Silverado Description

The brake booster vacuum sensor measures the vacuum in the brake booster assembly. The Electronic Brake Control Module (EBCM) supplies a 5 V reference and a low reference circuit to the brake booster vacuum sensor. The vacuum sensor supplies a voltage signal in relation to the pressure in the brake booster to the Electronic Brake Control Module. The Diagnostic Trouble Code (DTC) will be set when the Electronic Brake Control Module detected a too-low vacuum in the brake booster assembly.

OBDII Code C0299 2015 Chevrolet Silverado - Brake Booster Large Vacuum Leak Detected - AutoCodes.com — C0299 2015 Chevrolet Silverado Code - Brake Booster Large Vacuum Leak Detected

What does this mean?

What are the Possible Causes of the DTC C0299 2015 Chevrolet Silverado?

Vacuum leak at the brake booster
Faulty Brake Booster Vacuum Sensor
Brake Booster Vacuum Sensor harness is open or shorted
Brake Booster Vacuum Sensor circuit poor electrical connection
Faulty Electronic Brake Control Module (EBCM)

How to Fix the DTC C0299 2015 Chevrolet Silverado?

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 C0299 2015 Chevrolet Silverado 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 C0299 2015 Chevrolet Silverado code?

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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 C0299 2015 Chevrolet Silverado Code

1. What does the OBDII code C0299 mean on a 2015 Chevrolet Silverado?

C0299 indicates a "Brake Booster Large Vacuum Leak Detected," meaning the brake booster is not receiving sufficient vacuum to assist braking effectively.

2. What are the common symptoms of the C0299 code?

Symptoms may include a hard brake pedal, reduced braking performance, increased stopping distance, or a hissing noise from the brake booster area.

3. What causes the C0299 code on a Chevrolet Silverado?

Common causes include a leaking brake booster, damaged or disconnected vacuum hoses, a malfunctioning vacuum pump, or a faulty check valve.

4. Can driving with the C0299 code cause further damage?

Yes, driving with this issue can compromise braking performance, potentially leading to unsafe driving conditions or accidents.

5. How do I diagnose the C0299 code on my Silverado?

Start by inspecting the brake booster and vacuum lines for leaks or damage. Check the vacuum pump and ensure the check valve is functioning properly. Use a scan tool to confirm the code and monitor vacuum levels.

6. How is the C0299 code fixed?

Repairs may involve replacing a damaged brake booster, repairing or replacing vacuum lines, replacing the vacuum pump, or cleaning/replacing the check valve.

7. Can a faulty vacuum pump trigger the C0299 code?

Yes, a malfunctioning vacuum pump can fail to provide adequate vacuum to the brake booster, causing the C0299 code.

8. What tools are needed to troubleshoot the C0299 code?

Tools may include a scan tool, a vacuum gauge, and basic hand tools for removing and inspecting components.

9. How much does it cost to fix the C0299 code on a Silverado?

The repair cost can range from $150 to $700 or more, depending on whether the issue is a simple vacuum hose replacement or a more expensive brake booster or vacuum pump replacement.

10. Can I clear the C0299 code without fixing the issue?

Clearing the code without addressing the underlying problem will not resolve the issue. The code will likely return, and braking performance will remain compromised.