When the check engine light comes on, it will throw one of the following codes, which you can pick up on a code reader. Though in a lot of older vehicles, you’ll just get a curious check engine light as the engine temperature gauge inches closer to the red line. A warning message might come up in many newer cars with a digital dash display. In some cars, this is a simple red light shaped like a thermometer floating in waves. When the temperature of the coolant gets over that threshold, the car’s computer will activate the engine coolant temperature warning. It’s usually set around 240 to 250 degrees, which is just below the point where the moving components inside the engine start to be at risk of overheating damage. Most automakers set a threshold for the safe operating temperature of the engine based on the temperature of the coolant that passes through the engine block. This information is then sent to the car’s computer to help it adjust the timing and other conditions needed for peak internal combustion performance. Why the Engine Coolant Temperature Warning MattersĪ lot of modern cars have an engine coolant temperature sensor that actively monitors the temperature of the coolant in the radiator. In this post, we’ll dig deeper into the common reasons why your engine temperature light might come on and, more crucially, what steps you should take when it does. So, when that little coolant temperature warning light pops on your dash while you’re driving, it’s essentially your car’s way of saying, “Hey, there’s something off with my cooling process, and I’m getting a bit too hot under the hood.” Continuing to drive while your coolant temperature warning light is on could lead to severe consequences, including potential engine overheating, damage to vital components, and, in extreme cases, a complete engine seizure. ![]() ![]() Managing this heat is the job of your vehicle’s cooling system, which uses a carefully concocted mixture of anti-freeze and water to absorb the engine’s heat before returning it to the radiator for dissipation. Internal combustion engines, the powerhouse behind most modern vehicles, create a huge amount of heat. But what exactly does this unsolicited red light mean, and more importantly, how should you respond? It’s the dreaded engine temperature light, casting a glow that’s as chilling as it is irritating. We’ve all been there: cruising down the highway, belting out our favorite tune, when suddenly – an unexpected thermometer or simply the word “TEMP” or a more alarming ‘ENGINE OVERHEATING’ illuminates on the dashboard.
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