For 1990-2009 cars

Causes | Correction
--- | ---
Glazed brake linings | Replace the glazed brake linings.
Low engine vacuum | Diagnose the low engine vacuum condition.
Leaking vacuum booster | Replace the vacuum booster.
Restricted passage in vacuum booster | Locate and fix the source of the vacuum restriction in the vacuum booster.
Worn out brake linings | Replace the brake linings.
Incorrect lining material | Replace the brake linings.
Contaminated brake linings | Replace the brake linings.
Linings damaged by abusive use | Replace the brake linings.
Restricted brake fluid passage | Locate and fix the source of the brake fluid restriction.
Brake pedal linkage interference/binding | Repair/replace the brake pedal linkage.
Operator riding brake pedal | Advise the operator of proper brake usage.
Excessive vehicle loading | See the tire placard for vehicle capacity specification.
Leaking O-ring between the master cylinder and the vacuum booster | Overhaul the master cylinder in order to replace the O-ring.