The last trip of 15 miles the light never did go off. Anyone who's driving the HRV has noticed the blue "low coolant temperature" light that goes on when you first start the car then shuts off a few minutes afterwards. I replace thermostats on these all the time for this problem on these cars. automotive manufactures are now using lights instead of gauges To test this, start car and let run at idle and set heater fan on low. and has a built-in thermistor with a resistance which varies according to the engine coolant temp. To avoid potentially significant engine damage, it’s important that immediate action is taken if the red engine coolant warning light comes on. An audible alert may also be heard depending on your vehicle. In your service history Blue coolant light stays on or comes back on We have an 01 NB and the last few trips the blue coolant ligt takes quite a while to go off and will come back on after a few more miles down the road. As you have probably already guessed, the most likely reason for your Low Coolant Light to be on is…because your car is low on coolant. At this time, the engine is close to overheating. Please note we record all our calls to ensure that we give you the service you deserve. Coolant also helps lubricate some parts of your Versa, including its water pump. sensor detects the engine coolant temp. There may be a floating sensor in your coolant tank that triggers the warning light when the level drops. Red Engine Coolant Light On or Flashing. The coolant temperature warning light comes on when i start the car, in blue, and stays on all the time. Colors include blue, yellow, green, red, pink, turquoise, orange and purple. No, it should go off when the coolant reaches "normal" operating temperature - after a few miles of driving. Many Japanese vehicles (Honda, Subaru, Nissan, Suzuki, Mitsubishi and many more) require the use of blue coolant inside and outside warranty. Personally I'd much prefer a water temperature gauge Here is what the low coolant light means on your car and the (usual) suspects behind why your low coolant light is on. “These days, there’s no real reason for a coolant manufacturer to use a certain colour, so it’s not easy for you to know what chemicals are in the coolant just by seeing whether it’s blue, green, yellow or orange. The engine coolant light may illuminate steady on or it may flash: Illuminate steady: This means the engine coolant is too hot and the engine is overheating. To test this, start car and let run at idle and set heater fan on low. Registered Member; 1 3,968 posts; “In days gone by, the colour of coolant was determined by the type of chemicals used to prevent corrosion — meaning you could tell a lot about the type of coolant used by its colour. This BLUE illuminated light turns off when the engine is warmed up sufficiently. Thanks for the rapid answer, mate. When this process fails, the engine temperature increases and triggers the coolant warning light. Ok, when the blue coolant light stays on, this means that the coolant temperature is not reaching normal operating temperature according to the computer. With not enough coolant the engine will get overheated. Having a blue engine temperature warning light appear on your dashboard shouldn’t concern you anywhere near as much as a red one. The engine coolant temp. First and foremost, you should stop your car as soon as it’s safe to do so. Blue Engine Coolant Light On Dash ? There may be a floating sensor in your coolant tank that triggers the warning light when the level drops. It’s a sign that your engine is overheating and ignoring it could cause significant damage to your engine. The manual's section regarding the coolant temp light says "Illumination in BLUE indicates insufficient warming up of the engine." a red light is for low coolant or overheating. thus the engine coolant temp. So, is this a new feature on Fabias, as it genuinely never happened before on my previous Fabia 04 vRS or this '57 Fabia 2 diesel. Sign in to follow this . Blue coolant light in the instrument cluster means that the engine coolant temperature … Discussion Starter • #1 • Jul 25, 2007. I replace thermostats on these all the time for this problem on these cars. The light should turn off as the engine warms. Blue light in dash gets it's signal directly from the ECM. If the engine coolant temperature increases over the specified range, the indicator light/warning light blinks in RED. nam 0 nam 0 Advanced Club Member; Registered Member; 0 110 posts; Toyota Model: T-Sport 5dr Posted February 18, 2005. Once the pressure has subsided, you can remove the cap fully, check the level of the coolant and top up as required. damage. If the warning light illuminates red, it indicates that the coolant temperature is high. 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