Revision question · Braking systems

Your vehicle is fitted with air brakes. What does it mean if a brake warning light shows when you've just started the engine?

Revision material from the imported DVSA bank includes source-checked Lanekind learning corrections. These corrections are not newly issued official examination questions, and practice does not reproduce a live test paper.

Answer options

Low air pressure

Increased air pressure

The parking brake isn't working

The air reservoirs are fully charged

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Low air pressureThis was the right answer

It's dangerous to drive a vehicle with low air pressure. To alert you to this, all vehicles are fitted with a warning light and/or buzzer. Don't move your vehicle if this warning shows or sounds.

Reviewed reading for this question

Do not move with unsafe brake-air pressureReviewed guidance summary · A warning while stationary means keep the parking brake applied; one during travel requires a safe stop and fault repair. The ability to release the park brake does not prove sufficient service-brake pressure.

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