We've all been there.
You're driving along when suddenly a warning light appears on the dashboard. Is it something serious? Can you keep driving? Or should you stop immediately?
Modern vehicles are equipped with dozens of warning lights designed to alert you when something needs attention. While some warnings are minor, others can indicate problems that may lead to expensive repairs—or even leave you stranded—if ignored.
Here's a guide to some of the most common dashboard warning lights and what they mean.
Understanding the Colours
Before looking at specific warning lights, it's important to understand what the colours generally indicate:
🔴 Red Warning Lights
Red warning lights usually indicate a serious issue that requires immediate attention. Continuing to drive could cause damage or create a safety risk.
🟠 Amber/Yellow Warning Lights
Amber lights typically indicate a fault that should be checked as soon as practical. The vehicle may still be safe to drive, but the problem should not be ignored.
🟢 Blue or Green Lights
These are usually informational lights indicating that a system is operating normally, such as headlights or cruise control.
Check Engine Light
This is one of the most common warning lights drivers encounter.
Possible causes include:
- Faulty sensors
- Ignition issues
- Fuel system problems
- Emissions-related faults
- Engine management system issues
While the vehicle may continue to drive normally, it's important to have the fault diagnosed promptly. Ignoring the light can sometimes turn a minor issue into a major repair.
Engine Oil Pressure Warning Light
This is one warning light you should never ignore.
The oil pressure warning light may indicate:
- Low engine oil level
- Oil pump failure
- Internal engine issues
Driving with low oil pressure can cause severe engine damage within minutes.
If this light appears:
- Pull over safely.
- Switch off the engine.
- Arrange for the vehicle to be inspected before continuing.
Coolant Temperature Warning Light
This warning indicates that your engine may be overheating.
Common causes include:
- Low coolant level
- Cooling system leaks
- Thermostat issues
- Water pump failure
An overheating engine can suffer significant damage if driven for too long. If the temperature gauge is climbing or a coolant warning appears, stop driving as soon as it is safe to do so.
Battery Warning Light
Many drivers assume the battery warning light means they need a new battery, but that's not always the case.
The warning may indicate a fault with:
- The battery
- Alternator
- Charging system
- Electrical connections
Once the charging system stops working, the vehicle may eventually lose electrical power and fail to restart.
Brake Warning Light
Brake warning lights should always be taken seriously.
Possible causes include:
- Low brake fluid
- Worn brake components
- Electronic braking system faults
- Parking brake issues
If you notice any change in braking performance, have the vehicle inspected immediately.
Tyre Pressure Monitoring System (TPMS)
This warning indicates that one or more tyres may be underinflated.
Driving with incorrect tyre pressure can:
- Reduce fuel efficiency
- Increase tyre wear
- Affect handling and braking performance
A simple tyre pressure check may solve the issue, but recurring warnings could indicate a puncture or faulty sensor.
ABS Warning Light
The Anti-lock Braking System (ABS) helps maintain steering control during heavy braking.
If the ABS warning light appears:
- Normal braking may still function
- Emergency braking performance may be reduced
- The system should be inspected as soon as possible
Don't Ignore Intermittent Warning Lights
Many warning lights appear briefly and then disappear.
Even if a warning light turns off, the fault may still be stored in the vehicle's computer system. Intermittent faults are often early indicators of developing issues.
Having the vehicle scanned and inspected early can help prevent larger problems down the track.
What Should You Do When a Warning Light Appears?
- Don't panic.
- Check whether the light is red or amber.
- Refer to your owner's manual if you're unsure.
- If the vehicle shows signs of overheating, loss of power, unusual noises, or poor braking performance, stop driving immediately.
- Arrange a professional inspection to diagnose the fault.
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