A warning light appearing on your dashboard out of nowhere is one of the most common reasons drivers in Stockport book an appointment with A6 Autos. Understanding what dashboard warning lights mean can help you decide whether to carry on to your destination, book a check for later in the week, or pull over straight away. Here is a clear guide to the most common symbols and what to do about each one.

What the Colours Mean

Before looking at individual symbols, it helps to understand the colour system used across nearly every make and model:

• Green or blue: a system is switched on and working normally, no action needed
• Yellow or amber: something needs attention soon, book a check in the near future
• Red: a serious fault, stop driving as soon as it is safe to do so

Engine Management Light

Often shown as an engine outline, this light can indicate anything from a loose fuel cap to a more significant emissions or ignition fault. If it appears steady, it is usually safe to drive carefully to a garage. If it starts flashing, reduce your speed and get it checked as soon as possible, since a flashing light often points to a misfire that can damage the catalytic converter if ignored.

Oil Pressure Warning Light

Shaped like an oil can, this is one of the most urgent lights on any dashboard. If it comes on, stop the car safely as soon as you can and check your oil level once the engine has cooled. Continuing to drive with low oil pressure can cause serious and expensive engine damage within minutes.

Battery Charge Warning Light

This light means your car is running on battery power alone rather than being charged by the alternator. Turn off non-essential electronics such as the radio and air conditioning, and head to a garage before the battery runs flat completely.

Brake Warning Light

This can indicate anything from the handbrake being engaged to low brake fluid or a fault in the braking system itself. If the light stays on after releasing the handbrake, treat it as a red warning and get your brakes checked immediately.

ABS Warning Light

The anti-lock braking system helps you retain steering control under heavy braking. If this light comes on alone, your normal brakes will usually still work, but the anti-lock function may not, which is particularly risky in wet or icy conditions. Book a check promptly.

Coolant Temperature Warning Light

If this light appears alongside a rising temperature gauge, your engine may be overheating. Pull over safely, turn off the engine, and let it cool before checking coolant levels. Never remove the coolant cap while the engine is hot.

Airbag Warning Light

This means the airbag system has detected a fault and may not deploy correctly in a crash. It is not an immediate safety risk while driving, but should be checked as soon as possible, since it affects a critical safety system.

Tyre Pressure Warning Light

This indicates one or more tyres are underinflated. Check pressures as soon as you reasonably can, since underinflated tyres wear unevenly and increase the risk of a blowout.

What a Warning Light Cannot Tell You

A dashboard symbol tells you that a system has detected a fault, not exactly what caused it. Guessing and replacing parts based on the symbol alone can end up being an expensive way to solve the wrong problem. A proper diagnostic check reads the actual fault code stored in your car’s onboard computer, giving a precise starting point for repair rather than a guess.

Book a Diagnostic Check with A6 Autos

If a warning light has appeared on your dashboard, A6 Autos offers vehicle diagnostics from £60, using specialised software to identify the exact fault rather than guesswork. Book a diagnostic check online or call 0161 480 0919 to speak to the team.