Dashboard warning lights communicate through color and symbol, and the fastest way to gauge urgency is to read the color first — it works just like a traffic light.
Color tells you urgency
| Color | Meaning |
|---|---|
| Red | Serious — stop safely as soon as you can |
| Amber/Yellow | Caution — have it serviced soon |
| Green/Blue | Informational — a system is simply on or active |
Common lights worth knowing
- Oil pressure (red oil-can): low oil pressure — stop and shut off immediately or you risk engine damage.
- Temperature (red thermometer): the engine is overheating — pull over and let it cool.
- Battery/charging (red battery): a charging-system fault; you may be running on the battery alone.
- Check engine (amber engine): a stored fault to investigate soon — flashing means urgent.
- Brake (red): parking brake on, low fluid, or a brake fault.
- TPMS (amber tire): one or more tires are low on pressure.
Treat any red light as “act now,” and don’t shrug off amber lights — they exist to catch small problems before they become expensive ones. If you’re unsure what a symbol means, the owner’s manual has a full legend.
Frequently asked questions
What do the colors mean? Red is stop-now serious; amber is service-soon; green/blue is informational.
Is the check engine light an emergency? Usually investigate-soon, unless it’s flashing.
Red light while driving? Find a safe place to stop — especially for oil, temperature, or brakes.