🔴🟠🟢 THE ULTIMATE PEUGEOT 308 DASHBOARD WARNING LIGHTS BIBLE
Decode every symbol, stay safe & save money
📋 Complete A‑Z of Peugeot 308 warning lights
| Symbol / name | Colour | Meaning & action |
|---|---|---|
| 🛢️ Oil pressure | RED | Why: Low oil level or pump failure. Action: Stop immediately, check oil. |
| 🅿️ Brake (circle !) | RED | Handbrake on, low fluid, or pad wear. Safe? No – inspect brakes. |
| 🌡️ Coolant temperature | RED | Engine overheating. Stop, let cool, check coolant level. |
| 🔋 Battery charge | RED | Alternator fault or weak battery. Drive to garage (limited range). |
| ⚠️ Engine self-diagnosis | ORANGE | Emission or sensor fault. Steady: drive to garage; flashing: stop. |
| 🔄 ESP/ASR off | ORANGE | Traction control deactivated or fault. Safe but be cautious. |
| 🛞 Tire pressure ( (!) with flat) | ORANGE | Pressure loss. Check tires visually, adjust pressure. |
| 🧪 AdBlue / SCR | ORANGE | Low AdBlue level. Refill soon; otherwise engine won’t restart. |
| 💨 DPF (particulate filter) | ORANGE | Filter clogged. Drive at highway speed to regenerate. |
| ⏸️ Stop & Start | GREEN | System active (A with circle). Informational, no action. |
| 💡 High beam | BLUE | Main beam on. Dip when traffic approaches. |
| 🚗 Lane departure | GREEN/orange | Green: system on; orange: fault or alert. |
| 🔧 Service wrench | ORANGE | Scheduled maintenance due. Can be reset after service. |
🔥 Critical & common warning lights – with live animations
🛢️ Oil pressure
Definition: Low oil pressure. Why: Low oil, worn pump. Is it safe? ❌ Stop engine immediately – risk of seizure.
🌡️ Coolant overheat
What: Temp too high. Why: Leak, thermostat, fan failure. How to: Pull over, let cool, check coolant.
⚙️ Engine light (flashing)
Why: Severe misfire. Is it safe? No – catalytic converter damage risk. Action: reduce load, go to garage immediately.
🛞 Tire pressure monitor
Advantages: Early warning. Disadvantages: Can false-alert in cold. Check pressure manually.
▶️ Cruise control
Use: Indicates active set speed. Totally safe, just informative.
💡 High beam
Blue light = main beam on. Remember to dip for oncoming traffic.
🔎 In‑depth: colours & what they reveal
Red warning lights: Immediate danger. Includes airbag fault (airbag will not deploy), brake system failure, power steering malfunction. Why they occur: Sensor activation, fluid loss, electrical fault. How to react: Safely stop, consult manual, call roadside assistance. Is it safe? Never ignore red.
Orange / amber: Advisory. Types: DPF regeneration, low fuel, washer fluid, fog lights, ESP deactivated. Advantages: Gives you time to plan. Disadvantages: Vague – sometimes multiple causes. How to diagnose: Use onboard computer or OBD2 scanner.
Green & blue: Purely informational. Use: Indicators, position lights, eco mode. No danger.
📊 Advantages & disadvantages of Peugeot’s warning logic
✅ Advantages
- Early detection of brake wear, oil starvation, emissions issues.
- Colour-coded urgency – red means stop, orange means check soon.
- System self-checks every start – confirms vital functions.
- Helps maintain resale value by prompting timely repairs.
❌ Disadvantages
- False warnings due to sensitive sensors (e.g., tire pressure in cold).
- Can be expensive to diagnose without proper scanner.
- Some warnings cannot be reset without dealer tool.
- Overload of information may confuse new drivers.
1. Stay calm. 2. Turn on hazard lights. 3. Gradually reduce speed. 4. Pull over safely away from traffic. 5. Turn off engine. 6. Consult the owner’s manual or call for assistance. Never attempt to drive with a red brake or oil light.
❓ Why do warning lights appear & how to fix them
Why: Sensors monitor everything – from exhaust gases to fluid levels. A light may come on due to a loose fuel cap (emissions warning), low battery voltage, or a faulty glow plug (diesel). How to: For yellow lights, check obvious things: fuel cap, tire pressures, fluid levels. For persistent lights, use an OBD2 scanner to retrieve trouble codes. Common fixes: replace oxygen sensor, clean DPF, top up AdBlue.
How to reset basic lights: After fixing, some lights turn off automatically after a few drive cycles. Others (like service light) need manual reset: ignition off, press trip button, ignition on, wait 10 sec. For airbag or ABS, a diagnostic tool is usually needed.
