A Texas woman is going viral for not knowing what exactly to do when her low braking power warning goes off in her 2018 Toyota Camry. “Could be low brake fluid, failing brake booster, ABS system malfunction, or a problem with the hybrid brake system (if your Camry is hybrid). When the low braking power warning sign comes on, it’s best to find a safe place to stop, as the dashboard mentions. Faulty Vacuum Pump: If a vacuum pump is defective, it will eliminate the air in the vacuum booster. If the low braking warning sign is on, it may mean ABS randomly activates, leading to braking difficulty and errors.