Contents
Warning Light Categories by Severity
| Color | Severity | Action Required |
|---|---|---|
| Red | Critical | Stop driving immediately or risk severe damage/safety hazards. |
| Yellow/Orange | Caution | Address soon (within a few days) to prevent further issues. |
| Blue/Green | Information | Non-critical reminders (e.g., lights on, cruise control active). |
Critical Warning Lights (Red)
1. Engine Temperature Warning
Symbol: Thermometer icon in water waves.
Meaning: The Engine is overheating.
Possible Causes: Low coolant, coolant leak, faulty thermostat, radiator fan failure.
Action: Pull over immediately, turn off the engine, and let it cool. Check coolant level (only when cool). Call for assistance if needed. Urgency: 10/10
2. Oil Pressure Warning
Symbol: Oil can with a drop.
Meaning: Low oil pressure (engine lubrication failure).
Possible Causes: Low oil level, oil pump failure, clogged oil filter.
Action: Stop driving immediately to prevent engine damage. Check the oil level and top up if low. If light persists, tow to a mechanic. Urgency: 10/10
Caution Warning Lights (Yellow/Orange)
1. Check Engine Light
Symbol: Engine outline or “CHECK ENGINE” text.
Meaning: Engine or emissions system issue detected.
Possible Causes: Loose gas cap, faulty oxygen sensor, spark plug issues, catalytic converter problems.
Action: Check the gas cap first. If light is flashing, reduce speed and avoid heavy loads. Visit a mechanic for diagnostics. Urgency: 6-8/10
2. Tire Pressure Monitoring System (TPMS)
Symbol: Exclamation mark inside a tire cross-section.
Meaning: Low tire pressure in one or more tires.
Possible Causes: Puncture, temperature changes, slow leak.
Action: Check and adjust tire pressures to the recommended PSI (see door jamb sticker). Inspect for punctures. Urgency: 5/10
Information Lights (Blue/Green)
1. Cruise Control Active
Symbol: Speedometer with arrow or “CRUISE” text.
Meaning: Cruise control is engaged.
Action: No action needed unless unintended. Disable via steering wheel controls. Urgency: 1/10
Troubleshooting Tips
- For electrical warnings (e.g., battery light): Check battery terminals for corrosion and ensure they’re tight.
- For false alarms: Disconnect the battery for 5 minutes to reset the system (may clear temporary errors).
Preventive Maintenance
- Check fluid levels (oil, coolant, brake fluid) monthly.
- Rotate tires every 6,000 miles to prevent TPMS triggers.
- Follow the manufacturer’s service schedule for inspections.
FAQ
Q: Why do warning lights stay on briefly at startup?
A: This is a bulb check. Lights should turn off after 2-3 seconds unless there’s an issue.
Q: Can I drive with the check engine light on?
A: If steady, yes (but get it checked soon). If flashing, stop driving to avoid catalytic converter damage.
