Dashboard warning lights are color-coded: red means stop the car as soon as it is safe, amber/yellow means get the problem checked soon, and green or blue simply confirms a system is active. Knowing which color and symbol has appeared — and following the steps below — helps drivers avoid breakdowns or engine damage.
Every car uses a three-color system to signal problems on the instrument panel. According to breakdown-assistance organisations the RAC and the AA in the United Kingdom, and the American Automobile Association (AAA) in the United States, the color of a dashboard light indicates how urgently a driver needs to act, while the symbol identifies which system is affected.
What the colors mean
The RAC describes the system as a traffic-light scale: red signals a serious, potentially dangerous fault and means the driver should stop the car as soon as it is safe to do so; amber or yellow means something needs checking but is less urgent; green, white or blue simply confirms that a feature — such as headlights or cruise control — is switched on and working normally.
Dashboard warning light colors
Color
What it signals
Recommended action
Red
Serious or potentially dangerous fault
Pull over when safe and stop driving; call for assistance if needed
Amber / Yellow
A problem that needs attention but is not an immediate danger
Continue driving carefully and get it checked soon
Green / Blue / White
A system or feature is active
No action needed; informational only
Common warning lights and what to do
The exact icon varies slightly by manufacturer, but the AA, RAC and AAA guides agree on the meaning and urgency of most of the lights below; where the guides give different advice, this is noted.
Common dashboard warning lights
Light
Typical meaning
What to do
Oil pressure (oil-can symbol)
The oil pressure sensor has detected low pressure, not necessarily that an oil change is due, according to AAA
Stop as soon as safely possible; check the oil level; contact a mechanic if the light stays on
Battery / charging
The charging system has failed, per the AA
Considered unsafe to keep driving; stop safely and avoid restarting the engine
Brake warning
Can mean the parking brake is on, low brake fluid, or a braking-system fault, per the RAC
Safe to continue only if fluid level is normal and the pedal feels firm, per the AA; otherwise stop
Engine temperature
Coolant is overheating
Pull over and check coolant levels immediately if the light is red, per the AA
Check engine / engine management
Ranges from a loose gas cap to a failing sensor or catalytic converter, says AAA
If flashing, avoid heavy acceleration and high engine speed and stop when safe (AA); if solid, it is usually safe to drive to a garage soon
Tire pressure monitor (TPMS)
One or more tires are under-inflated
Advice differs between sources: the RAC says to stop as soon as safe to check tyre pressure, while the AA says it is generally fine to continue to a garage; both recommend reducing speed and avoiding harsh braking or steering
Airbag / SRS
A fault in the airbag or seatbelt-pretensioner system
Considered unsafe to drive; get it inspected immediately, per the AA and RAC
ABS
Anti-lock braking system fault
Normal braking still works; safe to drive but take extra care in wet or icy conditions and get it serviced soon, per the AA
Steps to take when a light comes on
Note the color first — red, amber/yellow, or green/blue — to gauge urgency.
Check whether the light is solid or flashing; a flashing engine-management light means avoiding heavy acceleration and stopping when it is safe, according to the AA.
Look up the exact symbol in the vehicle's owner's manual, since icon styles differ between manufacturers.
For red lights tied to oil, brakes, battery or temperature, pull over safely rather than continuing the journey.
For an amber ABS light it is generally safe to keep driving, but get it checked soon; for a TPMS light, advice differs — the RAC recommends stopping as soon as safe to check tyre pressure, while the AA says continuing carefully to a garage is usually fine.
If a light persists after basic checks (such as topping up oil or checking tire pressure), contact a mechanic or roadside assistance rather than continuing to drive.
All three organisations stress that drivers should never ignore a warning light or attempt to disable it, and should consult the vehicle-specific owner's manual when the meaning of a symbol is unclear.
Questions
What does a red dashboard warning light mean?
A red light signals a serious or potentially dangerous fault, such as an oil-pressure, brake, battery or overheating problem. The RAC and AA both advise stopping the car as soon as it is safe to do so.
Is it safe to keep driving with an amber or yellow warning light on?
According to the RAC, an amber or yellow light flags something that needs checking but is not an immediate danger, so driving carefully to a garage is generally considered acceptable, though the issue should not be ignored. Advice can still vary by light — for example, the RAC and the AA give different urgency levels for a low tyre-pressure warning.
Does the check engine light always mean a serious problem?
No. AAA notes the check engine light can be triggered by something minor like a loose gas cap or by a more serious issue such as a faulty oxygen sensor; the AA adds that a flashing light is more urgent than a steady one and calls for avoiding heavy acceleration and making a safe stop.
Does the oil light mean it's time for an oil change?
Not necessarily. AAA states the oil pressure light means the sensor has detected low pressure, which is a different issue from a routine oil-change reminder, and recommends stopping the car and checking the oil level.
What should I do if I don't recognize a warning light symbol?
The AA recommends checking the vehicle's owner's manual, since icon styles vary by manufacturer, and pulling over safely to contact breakdown assistance if the meaning or urgency is unclear.
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