🛑 Brake Warning Light — Which One Is It?

Most cars have two brake-related warning lights, and they're easy to confuse. One is almost always harmless; the other can be serious.

The red P or ! in a circle — parking brake / handbrake

This light comes on when the handbrake (parking brake) is applied. If it stays on after you've released the handbrake fully, check that it's properly released — sometimes it catches on the mechanism. If the light persists with the handbrake fully down, it may indicate the handbrake cable is out of adjustment, or on electric parking brake systems, a fault in the EPB system.

Many cars also use this same light to warn of low brake fluid. If the handbrake is definitely off and this light is on, check the brake fluid reservoir immediately.

The red ! or BRAKE light — brake system warning

A separate brake system warning (not the handbrake symbol) indicates a fault in the braking system itself — potentially serious. Combined with a soft or spongy brake pedal, this is a stop-now situation.

How to check brake fluid

1. Open the bonnet and locate the brake fluid reservoir — a small translucent plastic container near the back of the engine bay on the driver's side, with a yellow or black cap marked "BRAKE FLUID".
2. The fluid level should be between MIN and MAX on the side of the reservoir. You don't need to open the cap to check this.
3. If the level is low, top up with the correct grade (printed on the cap — usually DOT 4). Use a clean funnel and don't let any dirt enter the reservoir.
4. A slightly low level is normal as brake pads wear — the fluid level drops as pads thin. Very low means either the pads are very worn or there's a leak in the system.

ABS warning light

A separate amber ABS light means the anti-lock braking system has a fault. Your standard braking still works, but ABS (which prevents wheel lockup under hard braking) may not activate correctly. This is a get-it-checked-soon issue rather than a stop-immediately situation — but don't delay, especially heading into winter.