Excessive Brake Pedal Effort

POSSIBLE SOURCE:
- No brake fluid in brake master cylinder reservoir.
- Fill brake master cylinder reservoir and check for external leaks.

- Leaks at tube fittings and connections.
- Tighten fittings or replace tube seats or O-rings.

- Leakage at brake booster piston seal, input seal, or cover-to-housing seal.
- Replace power brake booster.