AutoCodes – Chevrolet – C0299 2017 Chevrolet Silverado

C0299 2017 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 2017 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 645

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 Jul 05, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C0299 2017 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 2017 Chevrolet Silverado - Brake Booster Large Vacuum Leak Detected - AutoCodes.com — C0299 2017 Chevrolet Silverado Code - Brake Booster Large Vacuum Leak Detected

What does this mean?

What are the Possible Causes of the DTC C0299 2017 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 2017 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 2017 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 2017 Chevrolet Silverado code?

Need more information on how to fix the C0299 2017 Chevrolet Silverado code? Get Access to Factory Service Manuals

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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 2017 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code C0299 in a 2017 Chevrolet Silverado?

- Common symptoms include a hissing noise coming from the brake pedal area, a firm brake pedal, reduced braking power, and the illumination of the brake warning light on the dashboard.

2. What causes the OBDII code C0299 in a 2017 Chevrolet Silverado?

- The code C0299 is triggered when the vehicle's onboard diagnostic system detects a large vacuum leak in the brake booster system, usually caused by a faulty brake booster or a disconnected vacuum hose.

3. How can I diagnose a large vacuum leak in the brake booster of a 2017 Chevrolet Silverado?

- You can perform a visual inspection of the brake booster and vacuum hoses for any signs of damage or disconnection. Additionally, using a smoke machine to test for leaks in the brake booster system is a common diagnostic method.

4. Can I continue driving my 2017 Chevrolet Silverado with the OBDII code C0299?

- It is not recommended to drive the vehicle with a brake booster vacuum leak, as it can compromise the effectiveness of the braking system. It is advisable to address the issue promptly to ensure safe driving conditions.

5. How can I repair a large vacuum leak detected in the brake booster of my 2017 Chevrolet Silverado?

- The most common repair involves replacing the faulty brake booster or repairing/replacing any damaged vacuum hoses. It is recommended to have the repair performed by a qualified mechanic to ensure proper installation and functionality.

6. Is the repair for OBDII code C0299 in a 2017 Chevrolet Silverado costly?

- The cost of repairing a large vacuum leak in the brake booster system can vary depending on the extent of the damage and the specific components that need replacement. It is advisable to obtain quotes from different repair shops for comparison.

7. Can a DIY enthusiast fix the OBDII code C0299 in a 2017 Chevrolet Silverado?

- While some experienced DIY enthusiasts may have the skills to address a brake booster vacuum leak, it is recommended to seek professional help due to the critical nature of the braking system. Incorrect repairs can compromise safety.

8. Will resetting the OBDII code C0299 in a 2017 Chevrolet Silverado make the issue go away?

- Resetting the code may temporarily turn off the check engine light, but it will not fix the underlying problem of a large vacuum leak in the brake booster system. The issue needs to be diagnosed and repaired to ensure safe operation of the vehicle.