Coolant light flashing3/10/2024 sweet smell from the engine compartment the engine is overheating (cooling water temperature display shows a value that is too high / is in the red area) Luminous coolant level indicator light in the instrument cluster Water vapor from the engine compartment loss of cooling water ( The coolant level in the expansion tank is low) typical Symptoms / signs for a defective or leaky cooling water hose.frequent defects arise due to Marten bites, Oxidation on the pipes and hose clamps, wrong Mounting oder durch porous will.a component of the cooling water circuit are the cooling water hoses ( Radiator hoses / cooling water pipes).If the light continues to be active or if the cooling water temperature display shows during the emissions test that the engine is overheating, the main inspection is deemed to be failed.Ĭooling water hose / radiator hose broken? The symptoms, repair / replacement and impending costs summarized: HU despite the coolant indicator light illuminating?Ĭooling water should be topped up immediately if the light flashes or lights up yellow after the engine has started. In case of emergancy:Idle pure and heating at full throttle! and im EmergencyMineral water or tap water also works as a coolant. The liquid starts at about 120 degrees Celsius zu. But if the engine gets hotter, turn off the vehicle and let it cool down. Will be the limit of 100 degrees not exceeded, then one careful onward journey usually still possible at low speed. If the problem occurs while driving, keep an eye on the temperature first. Otherwise there is a risk of engine damage due to overheating and damage to the cylinder head gasket, for example. If the indicator light comes on suddenly when the engine is running red or flashes, the engine must be switched off immediately and the vehicle must also be towed to the workshop. If there is a very large loss of cooling water, the cause should also be determined.Īs soon as the cooling water level drops, the temperature of the cooling water continues to rise. Is the fill level below the MIN mark, the car should be towed to the workshop. How exactly this works, where the container is located and what needs to be refilled are usually in the vehicle's manual. If the indicator light flashes or lights up yellow while the engine is running, the Cooling water level in the expansion tank to be checked. If there is a leak in the cooling system, the cause must be determined and remedied. If there is a crack or a defective seal anywhere, the pressure test ensures that the leak becomes apparent. Thus, the seal or the seals can be checked. So that the cause can be narrowed down further, the cooling system must be cut off in the workshop. Cylinder head gasket or cylinder head defective.Cable for sensors from the cooling circuit defective.Cooling water hose defective or leaking.Cooling water expansion tank defective or leaking.The following Causes are possible with an active coolant indicator light: The driver is warned so he can fix the problem. As soon as there are abnormalities in this area, the indicator light becomes active. The Engine control unit monitors, among other things, the cooling water temperature and the cooling water level by means of sensors. What could be the cause of the active coolant indicator light? Depending on the vehicle, the messages "Check coolant level", "Engine temperature too high" or similar messages may also (or only) indicate a problem with the engine cooling. When active, it will glow or flash red or amber. The indicator light looks like a Thermometerthat is in a liquid (2 wavy lines). What does the coolant indicator light look like? What needs to be considered can be found as follows. Unfortunately, the causes can be very different. The engine must therefore be switched off as quickly as possible and the vehicle towed to a workshop. Thus, overheating threatens an expensive one engine failure. But also the Cooling water temperature could be too high. Flashes or shines the indicator light red, this is often an indication that the cooling water level is too low. This should therefore only to be openedwhen the engine has cooled down. Open the container carefully!Īttention: The expansion tank for the cooling water is under pressure. The manual shows how the cooling water level can be checked and corrected if necessary. But if the Coolant indicator light lights up yellow, this can, among other things, indicate a too low Be the cooling water level. When fuel is burned in a combustion engine, it is well known that a lot of heat is generated, which is released via the cooling water (coolant, coolant) directly to the radiator and to the environment. If the coolant indicator light flashes or lights up in the car, what is the result and the cause? We have summarized the most important information in this article.
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