The brake booster uses engine vacuum or an electric pump to amplify braking force. A fault means the brake pedal will feel much harder to press, requiring significantly more leg force to stop.
🚗 Can You Continue Driving?
Yes, but braking requires much greater pedal force. Drive carefully.
🔧 Repair Difficulty
Medium
⚠️ Possible Causes
Failed vacuum pump (diesel/EV)
vacuum hose leak
faulty check valve
electric brake booster motor failure
✅ Recommended Actions
1Have the brake booster inspected immediately.
2Braking still works but requires much more effort.
3Do not drive in heavy traffic until repaired.
🚗 Common in These Vehicles
Not specified
Related Symbols
ABS Warning Light
Anti-lock Braking System fault. ABS may not function in emergency braking.
Attention RequiredBrake Warning Light
Brake system issue — or parking brake is engaged.
Immediate ActionBrake Fluid Pressure Loss
Brake fluid pressure is critically low. Braking may fail.
Immediate ActionBrake Pad Wear Warning
Brake pads are worn and need replacing soon.
Attention Required