You’re driving along, and suddenly a warning light pops up on your dashboard. The engine light, ABS warning, or something else can feel like a red flag demanding immediate attention. But what do these symbols really mean? More importantly, how should you respond?
While some lights might indicate something minor, others could signal a serious issue requiring quick action. Ignoring them could lead to bigger, more costly problems down the road. Understanding what these lights mean and how to handle them is essential for keeping your vehicle running smoothly and avoiding potential breakdowns.
In this post, we’ll help you decode the most common vehicle warning lights and advise you on what to do when they appear.
Need help with your warning lights, MOT or car servicing in Bromley? Bring your car to Bromley Vehicle Test Centre for a professional check-up. Our expert team is ready to assist you! Call us on 020 8460 6666 or email us at to book your appointment today and ensure your vehicle is in top condition.
At Bromley Vehicle Test Centre, we don’t just fix cars – we build trust, one service at a time. With over 40 years of experience, your safety and satisfaction are always our top priority.
What Are Vehicle Warning Lights?
Vehicle warning lights are dashboard indicators designed to alert drivers to potential issues or malfunctions within their car’s systems. These auto warning symbols serve as an early warning mechanism, giving you a heads-up before a problem becomes more serious or expensive. Depending on the light and the severity of the issue, you might be able to continue driving cautiously—or you may need to pull over immediately.
Most car dashboard symbols are color-coded:
- Green or blue: Informational (e.g., headlights on)
- Amber or yellow: Caution, something may need attention soon
- Red: Stop driving when safe—this is a critical alert
Modern automotive technology has evolved, meaning today’s cars are more advanced and can detect various issues. These vehicle malfunction indicators are tied directly to your car’s onboard diagnostics system, and ignoring them can result in failed emissions, MOT failures, or worse—roadside breakdowns.
The Common Car Warning Lights, What They Mean And What You Should Do
Your car’s dashboard lights aren’t just decorative—they’re your vehicle’s way of communicating. From minor alerts to critical issues, these symbols are part of the vehicle’s automotive technology system to keep you informed and safe. Below, we break down the most common car warning lights, their meanings, and the actions you should take.
1. Check Engine Light (Malfunction Indicator Lamp)
Meaning: Signals a problem with the engine or emissions system.
What to do: This is one of the most frequent vehicle warning lights and can be triggered by anything from a loose fuel cap to serious engine issues.
- Check your fuel cap first – If the light stays on, book a diagnostic check.
- Continuing to drive with this light on could damage the engine or catalytic converter.
This is a critical vehicle malfunction indicator and one of the top reasons vehicles fail their MOT.
2. Brake Warning Light
Meaning: Low brake fluid, worn pads, or a major brake system fault.
What to do:
- Stop the car safely and check the brake fluid levels.
- If fluid levels are normal, avoid driving and get the car inspected immediately
- Do not ignore this light—it affects stopping power
Essential car system warning light for safety and MOT compliance.
3. ABS Warning Light (Anti-Lock Braking System)
Meaning: There’s a fault with your ABS.
What to Do: Normal braking may still work, but ABS functionality will be lost.
- Drive cautiously
- Book your car into a trusted garage like Bromley Vehicle Test Centre for diagnostics.
If illuminated during an MOT, your vehicle will fail.
Also Read: DIY Car Repairs
4. Battery Charge Warning Light
Meaning: The battery isn’t being charged correctly.
What to Do: Could be alternator issues, battery failure, or wiring faults.
- Turn off non-essential electronics
- Get to a garage before the battery dies
- A dead battery can leave you stranded
A classic example of automotive light signals worth acting on quickly.
5. Engine Temperature Warning Light
Meaning: Your engine is overheating.
What to Do: This could be due to low coolant, radiator issues, or thermostat failure.
- Pull over safely and turn the engine off
- Check coolant levels only when the engine has cooled
- Seek assistance to avoid damaging the engine
One of the most urgent emergency car lights to address immediately.
6. Oil Pressure Warning Light
Meaning: Indicates dangerously low oil pressure.
What to Do: Driving with this light on can cause catastrophic engine damage.
- Stop the car immediately
- Check oil level and top up if needed
- If the light stays on, do not drive the vehicle—call for assistance
Always take this auto warning symbol seriously.
7. Headlight/Taillight Indicator Light
Meaning: A bulb has failed, or your lights are turned on/off.
What to Do:
- Inspect your vehicle’s lights
- Replace any non-functioning bulbs
- Check headlight beam alignment
A failed headlight or taillight may not cause an MOT fail but could attract police attention.
8. Airbag Warning Light
Meaning: A fault in the airbag system.
What to Do: Airbags may not deploy in a crash.
- Get your vehicle inspected ASAP
- Do not ignore this—it’s a serious car system warning light
Your MOT will fail if this light is active.
9. Low Fuel Warning Light
Meaning: You’re running low on fuel.
What to Do: Self-explanatory—but don’t let it run dry.
- Refuel at the nearest station
- Driving on low fuel can damage your fuel pump over time
A car dashboard symbol to watch, especially on long journeys.
10. Traction Control Warning Light
Meaning: Your traction control system is active or has malfunctioned.
What to Do:
- If flashing: The system is actively working on slippery surfaces
- If solid: There may be a fault
Still drivable, but it’s essential for maintaining road grip in poor conditions.
11. Power Steering Warning Light
Meaning: Your power steering system has a problem.
What to Do: You may find the steering wheel stiff or unresponsive.
- Stop and check your power steering fluid (if hydraulic)
- Get a mechanic to inspect electrical systems for newer cars
It can make driving unsafe, especially at low speeds.
Also Read: Car Care Guide
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Conclusion
Understanding your vehicle’s warning lights isn’t just about fixing and preventing problems. From the engine light to brake and oil alerts, every car dashboard symbol is vital in keeping you safe and your car roadworthy.
At Bromley Vehicle Test Centre, we bring over 40 years of hands-on automotive expertise, delivering reliable diagnostics, repairs, and MOT services with a commitment to honesty and quality. Our certified technicians use the latest automotive technology to identify and resolve issues—fast and accurately. We’ve seen and fixed it all, whether it’s a flashing light or a failed MOT.
Don’t take chances with your car’s safety—trust the Bromley Vehicle Test Centre experts. Get in touch by calling us now on 020 8460 6666 or email us at to book your check-up today!