Warning lights are your car’s way of communicating potential issues, and understanding them is crucial if you want to maintain your vehicle’s health and safety.
Modern cars use a colour-coded system to indicate the severity of problems, with yellow or amber lights signalling something needs attention soon but isn’t an immediate emergency, and red lights indicating serious problems requiring immediate action.
Below, I’ll explain the most common warning lights, helping you become more attuned to your car’s needs and potentially saving you from costly repairs down the road.
Tyre pressure
This yellow light, shaped like a tyre cross-section with an exclamation point, indicates one or more tyres have low pressure. Driving with underinflated tyres can lead to poor handling reduced fuel efficiency, and increased risk of a blowout, so check and adjust your tyre pressures as promptly as possible.
If this becomes a persistent problem you might need to have new tyres fitted, so visit reputable tyre fitters in Cambridge or your nearest town.
Check engine
The check engine light is usually amber and shaped like an engine outline. It can indicate a wide range of problems, from something as simple as a loose petrol cap to more serious engine troubles.
When this light appears, it’s best to have a diagnostic test run at your local garage. Continuing to drive with this light on could lead to more severe damage and higher repair costs.
Battery warning
Resembling a car battery, this red light suggests potential issues with your vehicle’s electrical system. It could indicate a failing battery, a faulty alternator or problems with the charging system.
If this light comes on while driving, turn off non-essential electrical items and head to a garage promptly to avoid being stranded with a dead battery.
Engine temperature
Usually red and resembling a thermometer, this light indicates your engine is overheating. Pull over safely, turn off the engine and allow it to cool down. Check your engine coolant levels once the radiator has cooled down. If the problem persists, you’ll need professional assistance.
Oil pressure warning
This red light, often shaped like an oil can, is one you shouldn’t ignore. It signals dangerously low oil pressure or inadequate oil levels, which can cause severe engine damage.
Pull over safely and switch off the engine immediately if this light comes on. Then check your oil levels and top up if necessary. But if the light persists, you’ll need a tow to the nearest garage.
Brake system warning
A red light shaped like an exclamation mark in a circle indicates problems with the brake system. If it stays on after releasing the handbrake, it could mean low brake fluid levels or worn brake pads. Given the critical role of your brakes, it’s best to have them examined promptly by a professional.
Anti-lock brake system (ABS) warning
This yellow light suggests a problem with your ABS, which helps prevent wheel lock-up during hard braking. While your standard brakes will still function, the ABS may not engage in an emergency. Have this looked at quickly to ensure optimal safety.
Airbag warning
A red light showing a person with a deployed airbag indicates a problem with the airbag system. This could mean the airbags might not deploy in an accident, significantly reducing your safety. Have this seen immediately by a professional.
What to do when a warning light appears
When faced with a warning light, the first step is to identify its meaning and severity. For red lights, it’s crucial to stop driving as soon as it’s safe and address the issue immediately. With yellow lights, it’s generally safe to continue driving but you shouldn’t delay having the issue remedied.
If you’re unsure about a light’s meaning, consult your vehicle’s manual or contact a professional mechanic. Remember, ignoring warning lights can lead to more serious and expensive problems. Regular maintenance can prevent many issues that trigger these lights, so consider following a servicing plan to keep your car in top condition.
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