Brake system fault diagnostics (Peugeot 305)

Brake pedal travel too long

• The brake pads are worn out
• Automatic brake regulators are stuck
• Excessive runout of brake discs
• Malfunction of the hydraulic circuit of the brake system

When braking, the car pulls to one side

• Incorrect tire pressure
• The brake pads are oily on one side
• The piston or wheel cylinder is stuck on one side
• New brake pads are installed on one side only
• Suspension or steering fault

When braking, vibration is transmitted through the brake pedal or steering wheel

• The front wheels are unbalanced or the wheel nuts are loose
• Excessive wear of disc brake pads
• Excessive runout of brake discs
• Grooves or scratches on the brake disc(s)
• The caliper(s) mounting bolts have become loose
• The brake drum(s) are warped or scratched
• The mounting bolts of the drum brake support disc have become loose
• Suspension or steering fault

The brakes are sticking

• The wheel cylinder pistons are stuck
• The handbrake is incorrectly adjusted or the handbrake cable is stuck
• The automatic brake regulators are stuck or faulty
• The master cylinder is faulty

The brake pedal sinks under my foot

• Air got into the brake system
• The master cylinder is faulty

You have to press too hard on the brake pedal to brake

• The brake servo does not work
• Brake pads are worn, oily or out of specification Specifications
• The rear brake pads are not installed correctly
• The new pads haven't been broken in yet
• One of the brake circuits is leaking

The brake pedal goes to the floor with almost no resistance

• Leak in the hydraulic circuit of the brake system
• The master cylinder seals are leaking