It’s no secret that modern car dashboards are packed with symbols, and keeping track of what each one means can feel like deciphering an alien language. Some are obvious, like the low fuel indicator or the seatbelt warning light, but others leave drivers scratching their heads. One symbol in particular—a little icon that many say “looks like a boat”—has been confusing drivers across the country. Despite its frequent appearance in discussions online, a surprising 80% of drivers still have no idea what it means.

This mysterious dashboard symbol, which looks like a thermometer sitting on wavy lines, has sparked plenty of humor on social media. A viral post on X (formerly Twitter) featured a user sharing an image of the symbol circled on her dashboard. “What does this light mean?” she asked. The internet, as expected, had a field day. One user joked, “That’s the ‘pirates approaching’ warning. Better start paddling!” Another quipped, “Looks like smooth sailing ahead.”

While the jokes are amusing, the reality is far more serious. That little icon isn’t a boat, nor does it mean pirates are nearby. It’s actually the engine coolant warning light, and it’s not something you can afford to ignore. In simple terms, this light indicates that your car’s engine coolant levels are low, or the engine temperature is rising to dangerous levels. Ignoring this warning could result in your engine overheating, and you might find yourself facing repair bills in the thousands.

A survey conducted by ATS Euromaster revealed that 80% of drivers couldn’t identify this crucial warning symbol. It’s a staggering statistic when you consider how vital the cooling system is to your car’s health. The coolant circulates through the engine to regulate its temperature, preventing it from overheating and causing catastrophic damage.

So, what should you do if this symbol suddenly illuminates on your dashboard? According to guidance from Eden Motor Group, the first thing you need to check is the color of the warning light. “If the light is red, you should pull over as soon as it is safe to do so and switch off the engine,” they advise. Continuing to drive with an overheating engine could warp engine components, crack the cylinder head, or even destroy the engine entirely.

Once you’ve safely pulled over and switched off the engine, allow it to cool down for at least 30 minutes before attempting any further checks. Opening the hood while the engine is still hot is dangerous, as pressurized steam from the coolant system could cause severe burns.

After the engine has cooled, you can carefully check the coolant levels. Most modern cars have a transparent coolant reservoir with clearly marked maximum and minimum levels. If the coolant level is below the minimum mark, top it up with the correct type of coolant recommended in your car’s owner manual. Never use plain water, as it lacks the necessary additives to protect your engine and cooling system.

But low coolant levels aren’t always the root of the problem. Eden Motor Group explains that other potential causes include a faulty sensor, a leak in the radiator, or a split hose. In some cases, you might be able to identify a coolant leak yourself by inspecting the engine bay for drips, hissing sounds, or a sweet smell. If you suspect a leak or can’t identify the issue, it’s best to call for roadside assistance or take your car to a qualified mechanic.

Regular vehicle maintenance is one of the easiest ways to prevent these issues from occurring in the first place. Checking your coolant levels periodically, inspecting hoses for cracks, and ensuring the radiator is functioning properly can save you from an expensive repair bill down the road.

In short, the dashboard symbol that looks like a boat isn’t as innocent as it seems. It’s a warning that your engine is at risk of overheating or that something in your coolant system is malfunctioning. When this light comes on, don’t ignore it. Pull over safely, let the engine cool down, check the coolant levels, and seek professional help if necessary.

Understanding your car’s warning symbols isn’t just about preventing mechanical issues; it’s about safety. Being informed empowers you to act quickly when something goes wrong, minimizing damage and keeping you safe on the road. So, the next time you see that wavy thermometer light pop up, you’ll know exactly what to do: stop, cool down, and address the problem before it escalates into a costly disaster.