12 Replies. When working properly, the cooling system keeps the engine running at peak efficiency and at its ideal operating temperature. Toyota high engine coolant temperature warning light. The check coolant light came on when I started the car (didn't go past the center on temp gauge. I don't know how to check the water pump itself. Then, once my engine is warm after some driving, it turns off. Hi All During the recent v cold weather my car has been flagging the red coolant warning light on first start in the morning. The cooling fan is activated in most—but not all—cars when you turn the AC to either a medium or high speed. I heard a small gurgle and hiss and noticed that the tank was full. The symbol should briefly illuminate on your dashboard when you start the car and go out shortly after the engine has started. It should be between the "Min" and "Max" lines. What could be causing this problem and what to check? Wear a thick glove or wrap the hand with a thick towel or a piece of rag and remove the radiator cap to check the coolant level. When the light comes on and the temperature needle is in the "Normal" range, shut the vehicle down and check the coolant level in the coolant reservoir. After driving for a while my red coolant light starts flashing. Coolant is full. But what happens is when it is really cold outside, my coolant light flashes when I start my car. A few hours later I drove it and it didn't come back on -went to the Bap Geon to get VW coolant and let the guy look at it. Causes of Coolant Loss. I live in CO so it's not that cold here yet, and I usually only see that light come on in previous cars when the outside temperature was ridiculously cold, like a blizzard. And if it has stopped working, you’ll need a professional to repair it for you. Can I still drive with my engine coolant temperature light on? If you have to pump the gas pedal in the morning to keep your car running, you may have a bad engine coolant temperature sensor. This light will come on when coolant levels are running low and the engine is overheating. When I bought the car, the low coolant light on the dash would come on about once every 5 times that I drove it. Drove it for about a week, nothing. Do you. In a 02 VW Beetle GLs the Water Temp light comes on when car starts and goes off after 10-20 min of driving is something wrong with coolant system? After that, this indicator light/warning light changes to BLUE and maintains illumination in BLUE. I recently had my coolant light come on intermittantly on my 2006 BMW X3. This light will come on when coolant levels are running low and the engine is overheating. The radiator fan runs very loud and fast and the car is overheating..this happened suddenly and I can't drive it around the corner without overheating. ENGINE COOLANT TEMPERATURE. According to the manual, it is okay to be blue and I have read that it is to indicate the engine is not warmed up yet. This is perfectly normal, but if the temperature light comes on while driving, immediate action should be taken, particularly if the symbol is red. Reply. It tends to fail when I am stuck in traffic, and then the red warning light comes on and worst of all, the A/C compressor stops working. Then The coolant light came on longer. Service engine light is on for evap small leak (think that’s unrelated to the coolant light?) I was only a mile from my house. Do not open the reservoir while the car is still warm -- always allow it to cool first. Manual says if car was overheating the light would stay on not flash. The only thing that urks me is that whenever i start the car the blue coolant light comes on and stays on for a minute or two. Expert: Robert ... Peugeot 308 sw 1600cc 2008 oil warning light came on .oil checked found to be low oil added Expert: Robert replied 5 years ago. If this sensor malfunctions, it could be causing the coolant light to turn on even if you don’t have low antifreeze levels. Asked by Wiki User 30 31 32 This coolant light also comes on for a low coolant level. To test this, find your radiator fan switch and disconnect the wiring harness. Coolant temperature warning light. Hi..there.. No. Red Engine Temperature Warning Light . This could be due to a leak in the system or it could be a sign of a larger problem, like a head gasket failure. DescriptionThis question was asked on the AskDAP Show Episode 1. Get a jumper wire and insert it into both contacts, your fan should come on. So now that its getting cold in the mornings, upon start up, my red coolant idiot light starts flashing every morning only on the first start up....If I turn off the engine and re-start, it goes away. That’s why it’s best to take your car to a garage. How can I tell if I have a coolant leak? If the coolant is low and your air conditioning is running, you may notice hot air coming from your car A/C vents. You may smell coolant in the cabin. My car has 180000 miles. Pull over as soon as possible and shut the engine off. It takes about 30 seconds (or sometime longer) before it clears itself. Another way to test the fan is to turn on the air conditioning. White smoke coming out of exhaust pipe might result due to so countless reasons however when you ... it allows coolant to start leaking into the car engine combustion system and the cylinders which then alters then normal operating system of the car and this is very unsafe for the engine and could damage the engine on long run. Hi I have a 2013 Chevy Cruze and the tempature light comes on as soon as u start the car and the check eingine light is on… there seems to be no leak and the gauge goes to H but the car isn’t really hot like I said u can start it and it will start off saying it is hot what could this be thanks . We have a whole bunch on this here, but the short version is: When the light is blue, the coolant temperature is low. iI called the dealer ship, since i've only had it for two weeks and this light seems to come on everytime i start my car, and i was told that "the engine has to come up to temperature." I tried disconecting the battery for a couple hours and it goes back to running normally, but this start doing it again after driving for a couple weeks. Typically the sensor, which monitors the coolant temperature, knows how to adjust to varying temperatures depending up the status of your car; running, warming up, or cold. Coolant light comes on, engine temp normal? Or you may smell the coolant leak when the car is parked. Upon starting, the engine temperature warning light should come on and then go off in two seconds or less. Normal? Wait for at last 30 minutes for the engine to cool down. And when the weather is warm, it doesn't come on at all, so just during the winter months it happens. It still runs fine and everything while it's flashing. I just notice it Thursday and now it comes on every time I drive the car and it does not stay on all the time. When you have a BMW coolant leak, you will notice a distinct sweet smell that wasn't there before. This implies low coolant level or excessive coolant temp, but neither are applicable as is cold start and level has been checked and is fine. You can call us out if your car won’t start or you think the … (When I started the car today it stayed on for a minute or two then went off as I kept driving). anyways, recently the coolant light has come on for less than 60 seconds and then went off. (Psst! It will turn off when your engine gets to appropriate operating temperatures. Why does the light come on? My wife refuses to move the car until the blue light … So I decided to check my coolant expansion tank. Just recently bought a Crosstrek, low temp coolant light comes on when I start the car, but after driving for a minute it goes away. VW engine cooling system warning light. You should never dare to continue driving when the light is on. It has about 180k miles a recent service and the coolant level is good and was changed about 1 year ago..connected Obd reader and there isn't any codes . The coolant light glowing blue when you start your car is a warning that the engine isn’t yet up to its optimal running temperature—so don’t push the engine hard. Your coolant light will come on when the sensor senses an incorrect change in the temperature in your system. Pull the car over somewhere when the light comes on. Bought a used 2000 Pontiac Grand Am GT1 from someone a month or two ago. 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