A warning light comes on, and you think: “Okay… but what now?”
Relax. Not every light means disaster. The key things are the color and the symbol you see.
🔴 RED WARNING LIGHTS – IMMEDIATE STOP
These indicate a real danger to your car or safety.
- Engine oil (oil pressure)
- Engine temperature / overheating
- Battery / no charging
- Brake system
- Handbrake
- Low brake fluid
- Power steering failure
- Airbags (AIRBAG)
- Seatbelt pretensioners
- Open doors
- Open hood
- Open trunk
- Transmission failure
- Engine failure (critical)
- Too low transmission oil pressure
- Cooling system
- Immobilizer (car didn’t recognize the key)
- Hybrid system failure
- High voltage failure (EV / hybrid)
👉 Red = stop immediately. Don’t drive any further.
🟠 / 🟡 ORANGE – CAUTION, CHECK
You can keep driving, but ignoring these may cause problems later.
- Check Engine
- Glow plugs (diesel)
- DPF filter
- EGR system
- Exhaust system
- Turbocharger failure
- ABS
- Traction control
- Lane assist (malfunction)
- Collision avoidance system (AEB)
- Parking sensors (fault)
- Rearview camera (fault)
- ACC radar (fault)
- Low tire pressure (TPMS)
- Tire damage
- Air suspension failure
- Suspension emergency mode
- Air conditioning failure
- Start-Stop system failure
- Automatic transmission failure
- Transmission overheating
- Power steering (partial failure)
- Low windshield washer fluid
- Rain / light sensor failure
⚠️ “ANNOYING BUT IMPORTANT” SYMBOLS
⚠️ “ANNOYING BUT IMPORTANT” SYMBOLS
- Low fuel level
- Seat belt not fastened
- Speed limit (traffic sign recognition)
- Driver fatigue detected
- Fuel filler flap open
- Key outside the vehicle
- Key fob battery low
- Service required / Maintenance due
🚗 Summary
Dashboard warning lights aren’t meant to scare you — they’re there to warn and inform.
Remember this simple rule:
🔴 Red – stop immediately and take action
🟠 Orange/Amber – drive carefully and check the issue
🟢 / 🔵 Green and Blue – everything is under control
If you’re driving a rental car and something seems unclear — don’t guess or improvise.
Contact the rental company and keep driving stress-free 😎
