C0299 2018 GMC Sierra 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 2018 GMC Sierra 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.
Code C0299 2018 GMC Sierra Description
What are the Possible Causes of the DTC C0299 2018 GMC Sierra?
- 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 2018 GMC Sierra?
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 2018 GMC Sierra 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 2018 GMC Sierra code?
Need more information on how to fix the C0299 2018 GMC Sierra code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the C0299 2018 GMC Sierra code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about C0299 2018 GMC Sierra Code
1. What are the common symptoms of OBDII code C0299 in a 2018 GMC Sierra related to a brake booster large vacuum leak?
- Common symptoms include decreased brake performance, a "hissing" sound when applying the brakes, and potentially a soft or spongy brake pedal.
2. What are some possible causes of the OBDII code C0299 indicating a brake booster large vacuum leak in a 2018 GMC Sierra?
- Causes can include a damaged or deteriorated brake booster, a faulty vacuum pump, a disconnected or damaged vacuum hose, or a malfunctioning brake booster sensor.
3. How serious is the OBDII code C0299 related to a brake booster large vacuum leak in a 2018 GMC Sierra?
- This code should be taken seriously as it can compromise the effectiveness of the vehicle's braking system, potentially leading to unsafe driving conditions.
4. Can I still drive my 2018 GMC Sierra with the OBDII code C0299 indicating a brake booster large vacuum leak?
- It is not recommended to drive the vehicle with this code present, as it can affect the brake performance and compromise safety. It is advisable to have the issue diagnosed and repaired promptly.
5. What are some repair tips for addressing the OBDII code C0299 in a 2018 GMC Sierra related to a brake booster large vacuum leak?
- Begin by checking the vacuum hoses for any signs of damage or disconnection. Inspect the brake booster and vacuum pump for any faults. It may be necessary to replace components such as the brake booster or vacuum pump to resolve the issue.
6. How can I diagnose the OBDII code C0299 indicating a brake booster large vacuum leak in my 2018 GMC Sierra?
- A diagnostic scan tool can help identify the specific cause of the code. Additionally, a visual inspection of the brake booster, vacuum hoses, and related components can provide valuable information.
7. Is it possible to reset the OBDII code C0299 in a 2018 GMC Sierra related to a brake booster large vacuum leak?
- While clearing the code may temporarily turn off the check engine light, it is crucial to address the underlying issue causing the code to prevent further safety risks and potential damage to the vehicle.
8. Will fixing the OBDII code C0299 in a 2018 GMC Sierra related to a brake booster large vacuum leak be costly?
- The cost of repair can vary depending on the specific cause of the issue. Simple fixes like replacing a vacuum hose may be relatively inexpensive, while replacing the brake booster or vacuum pump can be more costly.
9. Can a DIY enthusiast repair the OBDII code C0299 related to a brake booster large vacuum leak in a 2018 GMC Sierra?
- Depending on the cause of the issue, some DIY enthusiasts may be able to address the problem by replacing components like vacuum hoses. However, more complex repairs involving the brake booster or vacuum pump may require professional expertise.
10. How can I prevent the recurrence of the OBDII code C0299 indicating a brake booster large vacuum leak in my 2018 GMC Sierra?
- Regular maintenance checks, including inspecting vacuum hoses and components, can help prevent issues like a brake booster large vacuum leak. Promptly addressing any unusual brake system symptoms can also prevent the code from reoccurring.
Discuss the causes and fixes for C0299 2018 GMC Sierra OBDII Code
Code C0299 2018 GMC Sierra comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
