C0299 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 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 Description
What are the Possible Causes of the DTC C0299?
- 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?
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 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 code?
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Need Help with the Code?
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Information for Specific Makes
- C0299 Buick — Brake Booster Large Vacuum Leak Detected
- C0299 Cadillac — Brake Booster Large Vacuum Leak Detected
- C0299 Chevrolet — Brake Booster Large Vacuum Leak Detected
- C0299 GMC — Brake Booster Large Vacuum Leak Detected
Frequently Asked Questions about C0299 Code
1. What does the OBDII code C0299 mean?
C0299 indicates that the vehicle's control module has detected a large vacuum leak in the brake booster system, which can affect braking performance.
2. What are the common symptoms of code C0299?
Symptoms may include a hard brake pedal, reduced braking performance, a hissing noise when braking, and the illumination of the check engine or brake warning light.
3. What causes the C0299 code to appear?
Common causes include a cracked or damaged brake booster, a leaking vacuum hose, a faulty check valve, or an engine vacuum supply issue.
4. Can I drive with the C0299 code active?
It is not recommended to drive with this code active, as it can lead to reduced braking efficiency and pose a safety risk.
5. How is the C0299 code diagnosed?
A technician will inspect the brake booster, vacuum hoses, and check valve for visible damage or leaks, as well as perform a vacuum pressure test to pinpoint the issue.
6. How do I fix the C0299 code?
Repairs may include replacing a damaged brake booster, repairing or replacing vacuum hoses, cleaning or replacing the check valve, or addressing engine vacuum supply issues.
7. How much does it cost to repair a C0299 code?
Repair costs vary but may range from $100 to $700 depending on whether a hose, check valve, or the entire brake booster needs replacement.
8. Can a faulty brake booster cause other issues besides C0299?
Yes, a faulty brake booster can lead to increased stopping distances, poor brake pedal response, and even stalling in some cases.
9. How can I prevent the C0299 code from recurring?
Regularly inspect vacuum hoses for wear, ensure the brake booster system is maintained, and address any engine vacuum issues promptly.
10. Does the C0299 code always mean the brake booster is faulty?
No, it could also indicate a problem with the vacuum hoses, the check valve, or the engine's vacuum supply. Proper diagnosis is essential.
Discuss the causes and fixes for C0299 OBDII Code
-
Yes, placed PVC valves, air fliter, clean throttle body & new gasket, power steering fluid, STP Dexron VI transmission fluid, brake fluid, brake pedal position sensor, fuel purge valve. What else can I replace to get these lights to turn off!!
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Let me check if I can find more specific information. What model and year is your vehicle?
Have you checked or replaced the Vacuum Brake Booster Check Valve?
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