Typically you should get 5 volts with the engine on. I doubt you have any sensor going out, just a quirky thing. Stick your finger in the opening. For example, the temperature light flashes when you first start the car but stops flashing after the engine is warmed up or if the engine is restarted. Sometimes VW temperature light flashes intermittently. Engine Coolant This red warning light is the VW engine coolant symbol. 101 N Haven St Suite 301 Blue coolant light = engine cold. 4 40X40 Check the coolant temperature sensor, and the coolant level sensor and make sure that they are plugged in. normally when there is the red flashing thermometer the coolant is low. Stage 1: Cold Start-The ECM determines the presence of a cold start by comparing the engine coolant temperature to the ambient air temperature during startup. It would be easy enough to pour in a cup of water or coolant and water and see if … Vw Coolant Warning Light Flashing May 7, 2019 Vw or audi coolant light comes vw coolant light comes on but car is why the coolant level warning light is vw coolant light comes on but car is You should touch fluid. As I said, this is only a vague memory. JavaScript is disabled. Did the coolant warning light start flashing? Flashing blue coolant light = fault in the coolant monitoring system. Therefore, --IN MY VAN--the blinking light is ignored and will be suppressed, removed, disconnected, painted black, neutralized, KAPUTT, as a useless piece of VW would be fancy pants gimmick. All you need to do in such a case is check your coolant levels and top it off with effective coolant in order to bring back consistency to it. The engine is considered cold when: • Engine coolant temperature is below 122°F (50°C). You need to do something about diagnosing the cause of the heat. There may be a floating sensor in your coolant tank that triggers the warning light when the level drops. That is why you can only measure and topup when cold. If the level is ok the prongs that sense level are fouled. If this light turns yellow in your diesel VW it means the diesel exhaust fluid level is low, which will eventually prevent your engine from starting. I checked cooolant leval, that’s ok .But every time I turned the key to ignition on the problem continues.but when running the engine the coolant light vent off . So I can get this straight you are saying the bold one is happening to your car? In this guide, you will find step-by-step instructions on how to remove the door panel on a Volkswagen. 2002 beetle, blue coolant light flashing/blinking - VERY cold today - 2degrees! Follow this guide on how to diagnose VW engine problems. Your coolant level is low. This problem is usually caused due to a faulty temperature sensor or a damaged wire harness. Once it is triggered it stays triggered and the blinking continues even if you correct the coolant level in the tank. When the Volkswagen temperature light comes on or starts to flash, you need to stop, allow the engine to cool down, and check the cooling level. If the engine coolant level is low, add engine coolant. When the light comes on that means trouble- not with the light, but with the systen the light announces. Either way, do not drive if the coolant temperature light stays on or is flashing. This problem is usually caused due to a faulty temperature sensor or a damaged wire harness. Steady red coolant light = engine overheating, pull over and stop engine IMMEDIATELY and do not run until the problem has been identified. VW temperature light comes up at the cold start but goes away after a restart. If the warning light is illuminated even after startup, it indicates that the car’s computer has detected an issue within the system. 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