Overview
Have you ever wondered why your dashboard is blinking so many colourful lights right at you after you leave the driveway or when you’re five minutes away from a restaurant parking lot? Most drivers will probably have their own fair share of this experience, and it’s not a scary thing if you know exactly what you’re looking at.
Your dashboard will light up—most of the time they are simple reminders while others indicate problems that should not be ignored.
Understanding what the symbols mean can help you safely navigate the roads, make timely decisions, avoid unnecessary damages, and know when it’s time to book a professional service or inspection.
Common dashboard symbols and their meanings (example from left to right): Tyre Pressure Monitoring System Warning Light, Service Engine Soon Light, Seat Belt Warning Light, Engine Oil Pressure Warning Light, Brake System Warning Light, and Battery or Charging System Warning Light.
Why Do Dashboard Warning Lights Come On?
The dashboard is probably the most important part of your car when you’re driving—it shows you your odometer, different warning signs, headlight controls, turn signals, and more. When you’re driving, you can’t possibly check on the external parts of your car: your dashboard shows that for you!
The dashboard senses and monitors the different systems of your car. Whether it’s an undone seatbelt, left open door, fuel running low, or high beam, it identifies what’s wrong and labels it with different colours based on urgency. It’s important to note that they are early warning systems and they do not necessarily mean to “stop immediately,” it may simply mean that it requires urgent attention or reminds drivers about maintenance.
Dashboard Warning Light Colours: What Do They Mean?
Dashboard signals come in three colours: red, yellow/amber, and green/blue. The three colours indicate how serious the matter is: green light means everything is okay, yellow or amber means there might be a small problem but not urgent, and if it’s red, it must be addressed right away.
Colour | Common Examples | What It Means |
Red |
| Requires immediate attention. Stop the vehicle safely and investigate the issue as soon as possible |
Yellow / Amber |
| Indicates a warning or developing issue. The vehicle may still be drivable, but it should be inspected soon |
Green / Blue |
| Usually provides information about an active vehicle function rather than indicating a fault |
The Most Common Dashboard Warning Lights
Check Engine Light
Few dashboard symbols cause as much concern as the Check Engine Light. While it doesn't always indicate a serious fault, it should never be ignored. The engine warning light can illuminate something as simple as a loose fuel cap, but it may also point to more complex issues affecting the engine, fuel system, ignition, or emissions.
If the light appears and is solid, your vehicle may still be safe to drive for a short period. However, if the Check Engine Light begins flashing, it usually signals a more serious engine issue that could lead to significant damage if you continue driving. In this situation, it’s best to reduce your speed, avoid heavy acceleration, and have your vehicle inspected immediately to avoid any problems.
Common causes include:
Loose or damaged fuel cap
Faulty oxygen sensor
Worn spark plugs
Engine sensor malfunction
What should you do?
Schedule a professional diagnostic scan to identify the exact cause. Modern vehicles rely on onboard computers, so the warning light alone cannot pinpoint the problem.
Oil Pressure Warning
The Oil Pressure Warning Light is one of the most important warning lights on your dashboard. Since the engine oil lubricates the car’s moving components, reduces friction, and helps regulate engine temperature, dropping below the expected amount means that some components may not receive adequate lubrication which increases the risk of severe engine damage.
Unlike some warning lights that can wait until your next service appointment, this requires immediate attention. It’s not advised to keep driving with low oil pressure as this can result in costly repairs and the worst case: complete engine failure.
Common causes include:
Low engine oil level
Oil leak
Faulty oil pump
Blocked oil filter
Worn internal engine components
What should you do?
Once it shows up, safely pull over and switch off your engine. It’s best to check the oil level once your car engine has cooled. If the warning light remains on after topping up the oil, have your car inspected immediately before driving again.
Battery Warning Light
Seeing the Battery Warning Light doesn't always mean your battery is flat. More often, it only indicates that there's a problem with the vehicle’s charging system, either the alternator, battery, wiring, or the drive belt.
The battery powers your car’s engine while the alternator keeps it charged during normal driving. If the alternator isn’t working properly, your car may continue running for a short time using the remaining battery charge, but eventually the battery will drain completely.
Common causes include:
Failing alternator
Worn or damaged drive belt
Loose battery terminals
Faulty battery
Charging system issues
What should you do?
Once it shows up, immediate actions can be reducing unnecessary electrical usage such as your air conditioner or heated seats. It’s better to have it inspected as soon as possible especially if you notice dim headlights, you experience difficulty in steering, or multiple warning lights start appearing together.
Brake Warning Light
If we’re talking about safety, a car’s braking system is definitely the most important safety feature there is. That is why when the Brake Warning Light shows up, it should never be ignored. Sometimes, it’s not urgent and could be as simple as leaving your parking brake engaged. In other cases, it indicates that you have low brake fluid, worn brake components, or there’s a fault within your braking system.
If the warning light appears while driving and your brake pedal feels soft, spongy, or unresponsive, your safety might be compromised.
Common causes include:
Parking brake engaged
Low brake fluid
Worn brake pads
Hydraulic brake system issue
Brake system fault
What should you do?
Check if the parking brake has been fully released. If the warning light stays on or you notice changes in braking performance, arrange an inspection immediately. It’s best to avoid driving long distances until the issue has been assessed by a mechanic or has been serviced.
ABS Warning
Many drivers confuse the ABS Warning Light with the standard Brake Warning Light, but they indicate different things. ABS stands for Anti-lock Braking System, a safety feature designed to prevent the wheels from locking during emergency braking.
If the ABS light comes on by itself, your regular brakes will usually continue to work normally, but the anti-lock braking function may be disabled. This means your vehicle could take longer to stop or become harder to control during sudden braking, especially on wet or slippery roads.
Common causes include:
Faulty wheel speed sensor
Damaged ABS sensor wiring
ABS control module fault
Low brake fluid (in some cases)
What should you do?
While the vehicle is often still safe to drive carefully, it's important to have the ABS system inspected as soon as possible to restore full braking performance.
Tyre Pressure Warning
The Tyre Pressure Monitoring System (TPMS) warning light alerts you when one or more tyres may be underinflated. It’s important to keep your wheels the same pressure as this can affect handling and braking performance, and doing so could increase fuel efficiency and decrease tyre wear in the long run.
Changes in weather, particularly colder temperatures, can also cause tyre pressure to drop naturally, which is why some drivers notice this warning light more often during winter.
Common causes include:
Low tyre pressure
Slow puncture
Temperature changes
Faulty TPMS sensor
What should you do?
You can check your tyre pressure using a reliable gauge and inflate them to the manufacturer's recommended levels. If the warning returns shortly after inflating the tyres, have them inspected for leaks or damage.
Engine Temperature Warning
The Engine Temperature Warning Light indicates that your engine is overheating. This is a serious warning that should never be ignored, as excessive heat can damage the engine, cylinder head, or head gasket.
Common causes include:
Low coolant
Coolant leak
Faulty thermostat
Water pump failure
Radiator issues
What should you do?
Safely pull over to an area and switch off the engine. Allow it to cool before checking coolant levels, and never remove the radiator cap while the engine is hot, as pressurised coolant can cause serious burns. If the warning persists, arrange professional assistance before continuing your journey.
Airbag Warning
The Airbag Warning Light (also known as the Supplemental Restraint System warning light) indicates that there may be fault with your vehicle's airbag system or seatbelt pretensioners. While your vehicle may continue to drive normally, this warning suggests that the airbags may not deploy correctly in the event of a collision.
Common causes include:
Faulty airbag sensor
Damaged wiring or connectors
Seatbelt pretensioner fault
Battery-related electrical issues
What should you do?
Book an inspection as soon as possible. Although the warning doesn't usually require you to stop driving immediately, you shouldn't delay repairs, as the system is designed to protect you and your passengers during an accident.
What Should You Do When a Dashboard Warning Light Appears?
Keep it simple:
Stay calm.
Check the owner's manual.
Look for other or related symptoms.
Pull over safely if necessary
Warning Light | Severity | Can You Keep Driving? | Recommended Action |
Check Engine | 🟡 Medium | Usually, but book an inspection soon | Diagnostic scan |
Oil Pressure | 🔴 High | No | Stop safely and switch off the engine |
Brake System | 🔴 High | Only if safe to do so | Inspect immediately |
Battery | 🟡 Medium | For a short distance only | Check charging system |
Tyre Pressure | 🟡 Low–Medium | Yes, with caution | Check tyre pressures as soon as possible |
Engine Temperature | 🔴 High | No | Pull over safely and allow the engine to cool |
Warning lights are designed to protect your vehicle and not inconvenience you.
While some are simple reminders, others indicate issues that require prompt attention. Understanding what these symbols mean can help you respond appropriately, reduce the risk of further damage, and keep your vehicle safe and reliable.
If a dashboard warning light has appeared and you're unsure what it means, we have experienced technicians at Westside Auto who can diagnose the issue and recommend the right solution. Whether it's a routine service or a more complex repair, we're here to help keep your vehicle performing at its best.
