Car Dashboard Warning Lights Explained: What They Mean and What to Do
Modern cars are packed with sensors, and your car dashboard warning lights are how your vehicle tells you something needs attention. Some alerts are minor, while others signal serious issues that shouldn’t be ignored.
Knowing the difference can help you avoid breakdowns, prevent costly damage, and stay safe on the road.
This guide explains the most common dashboard warning lights UK drivers see — and what action to take when they appear.
Why car dashboard warning lights matter
Dashboard lights are designed to warn you before small problems turn into major repairs. Ignoring them can lead to MOT failures, unsafe driving conditions, or expensive mechanical damage.
Vehicle condition and faults can also affect records held through organisations like the Driver and Vehicle Licensing Agency, which is why staying on top of issues matters for resale and roadworthiness.
Most warning lights fall into three colour categories.
Red warning lights: stop as soon as it’s safe
Red lights indicate urgent problems. If one appears while driving, pull over safely and switch off the engine where possible.
Engine oil pressure
This means oil pressure is dangerously low. Continuing to drive could destroy your engine. Check oil levels once stopped, but don’t restart unless the issue is resolved.
Brake system warning
Often linked to low brake fluid or a serious braking fault. Driving with this light on can be extremely dangerous.
Engine temperature
Your engine is overheating. Stop immediately to avoid severe damage. Let the engine cool before checking coolant levels.
Battery or charging system
This suggests your battery isn’t charging properly. You may only have limited driving time before the car cuts out completely.
Amber warning lights: book a check soon
Amber lights usually mean something isn’t working correctly, but you can often continue driving carefully for a short time.
Engine management light
Also known as the check engine light, this can relate to emissions, sensors, or engine performance. The car may feel fine, but ignoring it can lead to bigger problems.
ABS warning
Your anti-lock braking system isn’t functioning. Normal brakes still work, but emergency braking performance may be reduced.
Tyre pressure monitoring system (TPMS)
One or more tyres may be underinflated. Check pressures as soon as possible to avoid uneven wear or blowouts.
Traction or stability control
This indicates a fault in systems designed to prevent skidding. Drive cautiously, especially in poor weather.
Green or blue lights: information only
These lights simply confirm something is active and don’t usually signal faults.
Common examples include headlights, indicators, cruise control, or high beams.
What to do when a car dashboard warning light appears
First, don’t panic — but don’t ignore it either.
If the light is red, stop driving as soon as it’s safe. If it’s amber, book a diagnostic check promptly. Your vehicle handbook can help identify specific symbols, but a professional scan will pinpoint the exact fault.
If multiple lights appear at once, or the car feels different to drive, it’s best to avoid further journeys until checked.
Can car dashboard warning lights affect your MOT?
Yes. Many warning lights, including engine management, ABS, and airbag indicators, can cause an MOT failure if illuminated at test time.
Fixing problems early not only keeps you safe — it can also save money by preventing repeat test fees.
How Rooster helps you stay on top of car issues
With Rooster, managing car problems doesn’t have to be stressful. The app lets you view MOT history, track mileage, store documents, and book diagnostics, servicing, and repairs for up to 50% less.
You can also compare insurance quotes, monitor vehicle value, and manage everything car-related in one place — making it easier to act fast when warning lights appear.
No guesswork. No juggling multiple apps.
Final thoughts
Dashboard warning lights exist for a reason. Some signal simple fixes, others serious faults — but all deserve attention.
Understanding what they mean helps you react quickly, protect your car, and avoid unnecessary repair bills.
And with Rooster, you’ve got the tools to handle it all from your phone.
Ready to take control of your car? Download the Rooster app to manage maintenance, compare insurance, book services for less, and keep everything in one place.
