The red brake warning light can mean the parking brake is on, brake fluid is low or there is a brake system fault. How to tell the difference.
Looking for more detail? Our full guide covers this topic in depth, with step-by-step advice and sources.
Either the parking brake is applied, or the brake fluid level is low, or the brake system has a fault.
What it looks like
A circle inside brackets with an exclamation mark, or the letter P. Colour: Red.
Common causes
- Parking brake not fully released
- Low brake fluid (often from worn pads or a leak)
- Electronic parking brake fault
What to do
- Check the parking brake is fully off.
- If it stays on, stop safely and check the brake fluid reservoir level.
- Low brake fluid can mean a leak: do not drive until checked.
Can I keep driving?
No, unless it is only the parking brake reminder.
MOT
Brake system warning lights indicating a fault are an MOT fail.
Symbols vary slightly between makes. Always check your owner's handbook. General guidance only; if in doubt, call your breakdown provider.
Sources and further reading
Facts checked on 20 October 2026. Spotted an error? Tell us and we will correct it.