Common Car Dashboard Warning Lights – Which Ones Need Immediate Attention?

Knowing what these warning lights mean can help you decide whether you can continue driving, need to get the car checked soon or should stop immediately. In general, red warning lights usually indicate a serious issue that needs immediate attention, while amber or yellow lights indicate a fault or condition that requires attention soon. Green and blue lights generally indicate that a feature or system is active.

However, warning light colours and meanings can vary between manufacturers and models. Always refer to your car's owner’s manual for the exact meaning of a symbol.

Car Dashboard Warning Lights: What Do The Colours Mean?

Before looking at individual warning lights, it helps to understand the 4 main colour categories used by most car manufacturers.

A warning light that flashes may indicate a more urgent problem than one that remains continuously illuminated. The exact meaning depends on the system and vehicle model.

Red Dashboard Warning Lights That Need Immediate Attention

Red warning lights generally indicate a serious fault or a condition that could make the car unsafe to drive. If one of these lights comes on while driving, find a safe place to stop and follow the instructions in your owner's manual.

1. Engine Oil Pressure Warning Light

The engine oil pressure warning light usually looks like an oil can with a drop falling from its spout. It indicates that the engine’s oil pressure has fallen below the required level.

Low oil pressure can prevent engine components from receiving adequate lubrication. Continuing to drive could cause severe engine damage.

What should you do?

• Stop the car at a safe location as soon as possible
• Switch off the engine
• Once the engine has cooled sufficiently, check the engine oil level using the dipstick
• If the oil level is low, top it up with the manufacturer-recommended grade only if you can do so safely
• If the warning remains on or the oil level is normal, do not restart or continue driving. Arrange roadside assistance

Simply topping up the oil may not resolve the problem if the warning is caused by an oil pump, pressure sensor or lubrication system fault.

2. Engine Coolant Temperature Warning Light

This warning light generally shows a thermometer surrounded by wavy lines. It indicates that the engine coolant temperature is too high and the engine may be overheating.

Overheating can damage the cylinder head, head gasket and other engine components.

What should you do?

• Pull over safely and switch off the engine
• Allow the engine to cool before inspecting the cooling system
• Never open the radiator cap or coolant reservoir cap while the engine is hot
• Check for visible coolant leaks once it is safe to do so
• If the warning persists or coolant is leaking, arrange roadside assistance rather than continuing to drive

Some cars also display a blue coolant temperature light when the engine is cold. This is generally an indication that the engine has not reached its normal operating temperature and is not the same as an overheating warning.

3. Brake System Warning Light

The brake warning light commonly appears as an exclamation mark inside a circle, sometimes surrounded by brackets. Depending on the vehicle, it can indicate that the parking brake is engaged, the brake fluid level is low or there is a fault in the braking system.

What should you do?

• Check whether the parking brake is fully released
• If the light remains on, stop safely and check the owner’s manual
• If the brake pedal feels unusually soft, the braking performance has reduced or the warning indicates a brake system fault, do not continue driving
• Arrange for the braking system to be inspected

A brake warning light that remains illuminated after releasing the parking brake should never be ignored.

4. Battery Charging System Warning Light

The battery warning light usually resembles a rectangular battery with positive and negative terminals. It indicates a problem with the vehicle’s charging system rather than necessarily a faulty battery.

Possible causes include a failing alternator, a damaged drive belt, loose electrical connections or a faulty charging circuit.

What should you do?

• Switch off unnecessary electrical accessories
• Find a safe place to stop
• If the light stays on while the engine is running, get the charging system checked immediately
• Avoid continuing a long journey, as the car may eventually lose electrical power and stall

If the warning appears alongside heavy steering, overheating or other serious symptoms, stop as soon as it is safe to do so. Some vehicles use the same belt to drive multiple components, so a belt failure can cause more than one problem.

5. Seatbelt Warning Light

The seatbelt warning light shows an icon of a seated person wearing a seatbelt. It illuminates when the driver or a passenger has not fastened their seatbelt. In modern cars, the warning is accompanied by an audible chime that continues until the seatbelt is fastened.

Depending on the model, the system may also detect unfastened seatbelts in occupied passenger seats.

What should you do?

• Ensure the driver and all passengers have fastened their seatbelts correctly
• Check that the seatbelt is not twisted or incorrectly latched
• If the warning remains on despite everyone being securely buckled, have the seatbelt buckle sensor or restraint system inspected

Important: A seatbelt warning is not necessarily a mechanical fault, but it should never be ignored. Always ensure everyone is properly restrained before driving.

6. Airbag Warning Light

The airbag or Supplemental Restraint System (SRS) warning light usually shows a seated person with a circle in front of them. It indicates a potential fault in the airbag or seatbelt pretensioner system.

The car may still be driveable, but one or more airbags or pretensioners may not work correctly in a collision.

What should you do?

• Have the SRS Airbag system inspected by an authorised service centre or qualified technician as soon as possible
• Do not attempt to repair airbag wiring or connectors yourself
• Avoid ignoring the warning simply because the car's normal driving functions appear unaffected

This warning does not necessarily mean an airbag will deploy accidentally. It means the system may not operate as intended.

Amber Or Yellow Dashboard Warning Lights You Should Not Ignore

Amber or yellow warning lights generally indicate a fault or a condition that needs attention. Some allow you to continue driving cautiously, while others require you to stop and arrange assistance. Check the owner’s manual to determine the correct response.

7. Check Engine Warning Light

The check engine light usually resembles the outline of an engine. It can illuminate due to problems involving the engine, fuel injection, ignition, emissions or exhaust systems.

Possible causes include a faulty oxygen sensor, misfiring spark plugs, an ignition coil issue or a problem with the emissions control system.

What should you do?

• If the light stays on continuously and the car drives normally, avoid hard acceleration and get the vehicle diagnosed soon
• If the light flashes, reduce speed and load immediately and pull over safely. A flashing check engine light often indicates an active misfire that can damage the catalytic converter
• If the engine runs roughly, loses power, overheats or makes unusual noises, stop driving and arrange road side assistance

A diagnostic scan is usually required to identify the underlying fault. The warning light alone does not reveal which component has failed.

8. Tyre Pressure Monitoring System (TPMS) Warning Light

The TPMS warning light generally looks like a cross-section of a tyre with an exclamation mark inside. It indicates that one or more tyres may have insufficient air pressure.

Incorrect tyre pressure can affect braking, handling, fuel efficiency and tyre life. Driving with severely underinflated tyres can also cause overheating and tyre damage.

What should you do?

• Reduce speed and avoid sudden braking or sharp steering inputs
• Stop at a safe location and inspect the tyres for visible damage
• Check the pressure of all tyres, including the spare if it is monitored
• Inflate them to the recommended cold tyre pressure mentioned in the owner’s manual
• If a tyre is damaged or losing pressure rapidly, do not continue driving on it

A TPMS light that flashes before remaining illuminated can indicate a fault in the monitoring system rather than low tyre pressure.

Also Read: Tyre Pressure Monitoring System (TPMS) - Feature Explained

9. ABS Warning Light

The Antilock Braking System (ABS) warning light usually displays the letters ‘ABS’ inside a circle. It indicates a fault in the anti-lock braking system.

ABS helps prevent the wheels from locking during hard braking, allowing the driver to retain better steering control. If the ABS warning light stays on, the conventional braking system may continue to work, but the anti-lock function may not be available.

What should you do?

• Drive cautiously and maintain a greater following distance
• Avoid sudden or aggressive braking
• Get the ABS system checked as soon as possible
• If the red brake warning light also illuminates, stop safely and arrange assistance

10. Electronic Stability Control (ESC) Warning Light

The ESC warning light generally shows a car with wavy lines underneath it. It can behave differently depending on the situation.

• Flashing light: The system is actively intervening to help maintain stability, usually because the tyres have lost some grip
• Continuously illuminated light: The system may have been switched off or a fault may have been detected

What should you do?

• If the light flashes briefly while driving, reduce speed and avoid abrupt steering or acceleration
• If it stays illuminated, check whether ESC has been switched off and consult the owner’s manual
• If the warning persists, have the system inspected

ESC is useful on slippery or uneven roads, so it is best to keep the system switched on during normal driving.

11. Diesel Particulate Filter (DPF) Warning Light

The DPF warning light is found in diesel vehicles equipped with a Diesel Particulate Filter. It usually resembles a rectangular filter with dots or small particles inside.

The DPF traps soot from the exhaust gases. Over time, accumulated soot needs to be burnt off through a process called regeneration. The warning light may indicate that the filter is becoming clogged and needs regeneration.

What should you do?

• Check the owner's manual for the recommended regeneration procedure
• Some vehicles may require a sustained drive at a specified speed and engine operating temperature to complete regeneration
• If the light remains on, or additional warning lights appear, get the vehicle inspected
• Do not attempt a forced regeneration unless the manufacturer specifically recommends the procedure and the required conditions are met

A DPF warning accompanied by a flashing engine light or significant loss of power needs prompt professional attention.

12. Power Steering Warning Light

The power steering warning light usually shows a steering wheel with an exclamation mark. It indicates a fault in the electric or hydraulic power steering system, depending on the vehicle.

If power assistance is lost, the steering can become considerably heavier, especially at low speeds.

What should you do?

• Reduce speed and avoid sudden steering movements
• Stop safely if steering becomes difficult or unpredictable
• Check the owner's manual for the recommended action
• Have the system inspected before continuing normal use

13. Transmission Temperature Warning Light

Some automatic cars have a dedicated transmission temperature warning light, which may show a gear symbol or a thermometer. It indicates that the transmission fluid or transmission system is overheating.

Excessive transmission temperature can affect gear changes and cause internal damage.

What should you do?

• Reduce speed and avoid heavy acceleration
• Stop at a safe location if the warning remains on
• Follow the cooling instructions in the owner's manual
• If the warning persists or the transmission behaves abnormally, arrange professional assistance

Green And Blue Dashboard Warning Lights: What Do They Mean?

Not every dashboard symbol indicates a problem. Green and blue lights usually show that a particular vehicle feature or system is active.

Some common examples include:

These lights generally do not require immediate attention. However, you should switch off features such as high beam headlights when they are not needed, especially when approaching oncoming traffic.

What Should You Do When A Dashboard Warning Light Comes On?

The correct response depends on the warning light, its colour, whether it is flashing and how the car behaves. Use the following steps as a general guide:

• Identify the symbol: Check the dashboard display and owner’s manual to understand what the warning means.
• Check the colour: Treat red warnings as potentially serious. Amber warnings also need attention, even if the car appears to drive normally.
• Look for other symptoms: Pay attention to unusual noises, smoke, burning smells, fluid leaks, loss of power or changes in braking and steering.
• Stop safely if necessary: Do not continue driving with warnings related to oil pressure, overheating or a serious brake fault.
• Get the fault diagnosed: A warning light may indicate a problem with a sensor or an entire system. A proper diagnosis is needed before replacing parts.

Frequently Asked Questions (FAQs)

Can I drive my car with the check engine light on?

If the check engine light is continuously illuminated and the car drives normally, you can generally drive cautiously to a service centre for diagnosis. However, if it flashes, or the engine misfires, loses power or makes unusual noises, stop safely and arrange assistance.

Which dashboard warning lights mean I should stop immediately?

The engine oil pressure, engine overheating and serious brake system warnings generally require you to stop safely and address the issue immediately. A flashing check engine light also needs urgent attention, particularly if the engine is misfiring.

Why do dashboard warning lights come on when I start my car?

Most cars illuminate several warning lights briefly when the ignition is switched on. This is a self-check to confirm that the warning systems and dashboard indicators are functioning. They should switch off after the engine starts or the system completes its check. If a warning remains illuminated, consult the owner's manual.

What does it mean when a dashboard warning light flashes?

A flashing warning light can indicate that a fault needs more urgent attention than a continuously illuminated light. For example, a flashing check engine light indicates an active engine misfire. However, some systems flash during normal operation, such as the ESC light when it intervenes to maintain traction.

Can I reset a dashboard warning light myself?

Some warning lights switch off automatically once the underlying condition is corrected. Others require a diagnostic scan or professional repair. Resetting a warning light without fixing the underlying fault can hide a potentially serious problem. Always identify and address the cause before attempting a reset.

Also Read: Pre-Delivery Inspection (PDI) Guide – What It Is, Steps, Checklist & Tips

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