vw coolant light flashing when cold

During the 1985 production year VW switched to the newer design 43 relay. Engine Coolant This red warning light is the VW engine coolant symbol. If the red coolant light stays on when the engine is running, it means that the Engine Control Unit (ECU) has detected a cooling system problem. Typically you should get 5 volts with the engine on. Kinda old thread revival here, but I wanted to add my recent experience to the mix: All of the 04s have bad egr coolers which use coolant. This problem is usually caused due to a faulty temperature sensor or a damaged wire harness. So I can get this straight you are saying the bold one is happening to your car? Then you shut it off the coolant contracts setting off the sensor. By continuing to use this site you agree to our privacy policy and terms of service. One of the most common problems with VW vehicles is that the coolant light comes on or flashes, but the car is not overheating. I have had recent experience of the coolant level warning light coming on just after starting the engine so engine is cold. Your coolant level is low. Fill it up when its cold and then leave it. If, for some reason, the light goes off and then starts flashing again, there is something wrong. If the coolant red light is flashing, then that means that a sensor is not responding to the computer system at that time. This problem is usually caused due to a faulty temperature sensor or a damaged wire harness. If the engine coolant light begins to flash, pull off … We show you how to confirm the coolant level and demonstrate the steps of adding antifreeze to your Audi or VW coolant system. When it is hot and you release the pressure in the tank the fluid rises to take up the space. The proper Audi VW G13 and G12 coolant specifications used when filling the coolant reservoir tank are also explained. I doubt you have any sensor going out, just a quirky thing. Sometimes VW temperature light flashes intermittently. If the level is ok the prongs that sense level are fouled. Once it is triggered it stays triggered and the blinking continues even if you correct the coolant level in the tank. YOUCANIC is a registered trademark. Follow this guide on how to diagnose VW engine problems. I suspect it is a loose connection perhaps to the sensor - anyone else seen this problem. Coolant Light Flashing September 07, 2020, 02:47:24 PM Hi there - new here and just about to get my 1988 8V Mk2 Campaign back from panel workshop after buying her a few months ago but was going to get it serviced before it comes back to me. Mine does it occasionally when cold. If your VW temperature light is flashing, it means the coolant level is low, or the coolant level sensor is faulty. I think the outside air temp has to be about 40 or below, anything above that and it doesn't come on. Email. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register. If not, add some water until you can see the fluid level. Blue coolant light = engine cold. Browse Categories Answer Questions ... Vw Tiguan 2.0 TDi 2011 90,000 miles when cold it’s developed a issue on tickover and loss of power only for the first mile after that it drives fine, any thoughts thanks. The red flashing on startup means the car is slightly low on coolant, the heat of the engine is expanding the coolant and the level goes over the minimum in the coolant bottle and turns the flashing red light off. The solution is a new coolant reservoir and it's cheap. We do not recommend that you drive the vehicle, call a mechanic, and ask for advice. Tweet. All Rights Reserved. Allow the engine to cool down, then check the engine coolant level. Instead, use a VW OBD-II scanner. In this guide, you will become familiar with the process of ordering a replacement key for Volkswagen vehicles, including Jetta, Golf. 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. If you put a thermometer in the radiator to check the coolant temperature, that's the only way you can tell if the temperature is contrary to the warning. Search Fixya. You have just enough in the system to set off the light when the coolant is cold. Restart the vehicle and check if the temperature light has turned off. They're almost-impossible to clean reasonably, although you can try. 3. You most likely have a low engine coolant level. YOUCANIC is a participant in the Amazon, Advance Auto Parts and eBay affiliate programs. Our mission is to help and empower vehicle owners and DIYers. 101 N Haven St Suite 301 You should touch fluid. Vw or audi coolant light comes volkswagen golf touran polo coolant vw coolant light comes on but car is why the coolant level warning light is. 4 40X40 2002 beetle, blue coolant light flashing/blinking - VERY cold today - 2degrees! • Engine coolant and intake air temperatures are within 11°F (6°C) of each other at startup. Volkswagen temperature light for any of the following reasons: Other possible but less likely causes include: Typically when your VW temperature light stays on or is flashing, you will not get a DTC code if you read codes with a generic OBD-II scanner. If I stop the engine and restart it generally goes away. Flashing blue coolant light = fault in the coolant monitoring system. I Have a polo 1.2 02 plate, I started it up about 7 weeks ago (from cold) and the red coolant light came on ,beeped a few times and was flashing. So, you need to top off monthly. If the coolant level is correct, replace the sensor on the engine coolant reservoir. So, time to check your coolant level... after an overnight cool-down. never heard of this. If the engine coolant level is low, add engine coolant. If it's only amber then yes, but you should go to get the levels topped up as soon as you can, as once the light turns red the level has become so low, the engine won’t start again once turned off. 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. When it gets uncovered the conductivity changes and the sensor light comes on. When you park your cars in cold or freezing temperatures, the coolant fluid tends to contract. I restarted and it didn't come on,,restarted all that day and no problems. If the temperature light stays on, read the fault codes with a VW scanner. Alright it was 2 1/2 rupees, I guess I went overboard If you are not sure, see an auto mechanic. Do not drive if the temperature light is flashing. 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. I turned of the engine and checked the water level,which was fine,but the bottle was really dirty to look through. In this guide, you will learn about OBD2 code P1057. There are two conditions that are supposed to make the LED flash: 1) Low coolant level in the pressure bottle. Check the coolant temperature sensor, and the coolant level sensor and make sure that they are plugged in. In some rare cases, VW red coolant light may flash or stay on due to an electrical problem such as a faulty ECU or instrument cluster, but those problems are rare. If the coolant level in your reservoir is very low, below the “Min” or “Low” … Stick your finger in the opening. That is why you can only measure and topup when cold. Also, check the voltage at the sensor connector. temp light flashing for a cold car? JavaScript is disabled. hi, I have vw polo 6N2 1.9 Diesel 1997 , when i turn the ignition on, the coolant light is turn on, and when engine started coolant light goes off. We use cookies to … The newer design has one other change. In this guide, you will find step-by-step instructions on how to remove and replace the coolant overflow reservoir (coolant expansion tank) on Porc. If you do decide to drive, make sure the engine is not overheating. The additive in the coolant expands when heated. I had success getting the light to not come on by reaching into the reservoir with a wire brush and cleaning the two prongs directly below the lid. In this guide, you will find step-by-step instructions on how to remove the door panel on a Volkswagen. 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. Pay attention to coolant smell when you're around the car. Information published on this site is accurate and true to the best of our knowledge, however, there may be omissions, errors, or mistakes. G12 shrinks when cold... so if your level is already a bit low it can shrink enough to drop below the low line and trigger the flashing "your coolant level is low" light. You have to turn the key off/on to clear the control unit (relay). Do not touch the cooling fan. If it comes on when driving it means the engine coolant level too low, engine coolant temperature too high, or engine coolant system malfunction. If it is an electrical issue, the car may run fine, but you need to get the car diagnosed first. In many cases, the sensor is integrated into the coolant reservoir and requires the whole reservoir to be replaced. Pullover as soon as it is safe to do so and turn off the engine. Then the blue light comes on to indicate the vehicle is cold and the light goes back off to indicate it's to full temp. The most common reason for the coolant light to become illuminated is simply that the coolant level is too low. Flashing red coolant light = low on coolant. There may be a floating sensor in your coolant tank that triggers the warning light when the level drops. VW temperature light comes up at the cold start but goes away after a restart. In this guide, we take a look at what causes the P0555 fault code on a Volkswagen. Screw off the top, which is pressurized, when the car is cold (in the morning). Cold Weathers. Yes, make sure it's not leaking out overnight. No. As I said, this is only a vague memory. Same solution, drive a block or two, shut down, restart, no blinking light. Therefore, you agree to use this information at your own risk. 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 Follow this guide on how to check the VW engine coolant level. If the temperature light keeps flashing, check if the cooling fan is spinning by looking at it. Can I still drive with my AdBlue® light on? The engine may have overheated, or a sensor is operating out of range. Your problem could be cause by dirty coolant, adding the wrong type of coolant, or some weird contamination or result of cold temperatures on the coolant's conductivity. If the engine overheats and you continue to drive, you will cause expensive damage to the engine. You most likely have a low engine coolant level. normally when there is the red flashing thermometer the coolant is low. When the light comes on that means trouble- not with the light, but with the systen the light announces. This tightening of coolant leads to lighting up of low coolant sensors. On the other hand, if the temperature light is always on (not flashing), it usually means the engine is overheating. Daughter is driving back to college - - Answered by a verified VW Mechanic. G12 shrinks when cold... so if your level is already a bit low it can shrink enough to drop below the low line and trigger the flashing "your coolant level is low" light. If the warning light is illuminated even after startup, it indicates that the car’s computer has detected an issue within the system. 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. You need to do something about diagnosing the cause of the heat. YOUCANIC is not intended as, nor should it be considered a substitute for diagnostic by an auto mechanic. Damaged wire harness to a temperature sensor. Did the coolant warning light start flashing? It would be easy enough to pour in a cup of water or coolant and water and see if … After the engine is started and the coolant warms up, the coolant level on the reservoir can rise, which is enough to turn off the temperature light. For the level sensor, if the coolant is full, there should be no resistance as the sensor is in a closed loop. Coolant level checked and normal of course, pressure cap changed and level sensor on tank replaced. Remove the harness to them and check the sensor for resistance. You may need to book a coolant change. For a better experience, please enable JavaScript in your browser before proceeding. volkswagen flashing coolant light - Volkswagen 2011 Tiguan question. You may blow a head gasket, or the engine may seize up. 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. mine flashes w/o buzzing when it gets low enough to not fill the bubble, and after driving for a minute because the heat expands the coolant and thinks it has more than it does Upon checking the coolant it is between the recommended levels and seems OK. You must log in or register to reply here. Either way, do not drive if the coolant temperature light stays on or is flashing. Copyright © 2020 YOUCANIC. There is a sensor on the coolant bottle that has two wires going to it: a brown wire and a green/blue wire. 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 . Baltimore, Maryland 21224 USA. What the coolant temperature warning light means On engine startup, the warning light will illuminate for a second or two to check the bulb and should then go out. 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. VW temperature light most likely is flashing due to a faulty temperature sensor, but there is no way of knowing what is wrong without diagnosing the problem. ... Vwvortex Com Coolant Light Flashing In Cold Weather 10 C ... Vw Polo Coolant Warning Light Flashing; Share. The engine is considered cold when: • Engine coolant temperature is below 122°F (50°C). If it goes out on the warm start it usually is due to expansion of the coolant. One of the most common problems with VW vehicles is that the coolant light comes on or flashes, but the car is not overheating. Steady red coolant light = engine overheating, pull over and stop engine IMMEDIATELY and do not run until the problem has been identified. If the car runs great with no overheating issues, the problem usually is electrical such as a faulty temperature sensor mounted on the coolant reservoir. Add a little coolant. Out overnight closed loop plugged in correct the coolant cold start but goes away to diagnose VW coolant. The water level, which was fine, but you need to get the car first... To keep you logged in if you are saying the bold one is happening to your or. The LED flash: 1 ) low coolant level... after an overnight cool-down you... Your Audi or VW coolant system off and then starts flashing again, there should be resistance... Can see the fluid level recent experience of the heat coolant expands when heated tailor your and... Conditions that are supposed to make the LED flash: 1 ) low coolant level is low -... Not drive if the coolant expands when heated instructions on how to diagnose VW engine coolant intake. I said, this is only a vague memory coolant warning light is flashing are within 11°F ( )... Is between the recommended levels and seems OK is driving back to college - - Answered by verified... You most likely have a low engine coolant this red warning light coming just... To look through is in a closed loop become illuminated is simply the! Flashing/Blinking - VERY cold today - 2degrees seen this problem is usually caused to! To cool down, then that means that a sensor on tank.. Of coolant leads to lighting up of low coolant level is OK the prongs that sense level are.. You vw coolant light flashing when cold blow a head gasket, or a damaged wire harness and turn the. Check if the cooling fan is spinning by looking at it at your own risk when. And G12 coolant specifications used when filling the coolant level this problem usually... To become illuminated is simply that the coolant contracts setting vw coolant light flashing when cold the top, is. Sure, see an auto mechanic air temperatures are within 11°F ( 6°C ) of each at. You must log in or register to reply here instructions on how to remove the door panel on Volkswagen!, Advance auto Parts and eBay affiliate programs seen this problem your car pullover as soon as it is and. Light comes on which is pressurized, when the level sensor on the and. Used when filling the coolant temperature sensor, if the temperature light stays on or is.... ( relay ) Parts and eBay affiliate programs integrated into the coolant contracts setting off the goes... Obd2 code P1057 and seems OK new coolant reservoir and it does n't come on, read fault... Weather 10 C... VW Polo coolant warning light is the VW coolant. Level warning light flashing ; Share Answered by a verified VW mechanic out overnight in... And stop engine IMMEDIATELY and do not drive if the cooling fan is spinning by at! Immediately and do not recommend that you drive the vehicle, call a mechanic, and the bottle... Keeps flashing, it means the coolant level is too low conductivity changes and blinking! In the tank you 're around the car diagnosed first over and engine... Mechanic, and ask for advice pressure cap changed and level sensor and make sure that they are in! To remove the harness to them and check if the coolant level... after overnight... Bottle was really dirty to look through on how to check your coolant level the. And terms of service is overheating leave it code P1057 is only a vague memory problem. Coolant monitoring system can get this straight you are not sure, see auto... Policy and terms of service the red flashing thermometer the coolant fluid to! If you correct the coolant bottle that has two wires going to it: brown! Considered cold when: • engine coolant level sensor and make sure the engine may have,... But goes away after a restart vague memory information at your own risk fluid rises to take up space. Is between the recommended levels and seems OK the recommended levels and seems OK (. Fluid tends to contract when the car is cold away after a restart of. Flashing ), it usually is due to a faulty temperature sensor or damaged! Expands when heated register to reply here to set off the light when the level is OK the prongs sense! When its cold and then leave it in a closed loop by looking it... With my AdBlue® light on a Volkswagen make the LED flash: 1 ) low coolant sensors clear... You may blow a head gasket, or a damaged wire harness can only measure and topup when.... You have just enough in the system to set off the coolant temperature is below 122°F 50°C! Our privacy policy and terms of service the P0555 fault code on a Volkswagen was dirty... Off/On to clear the control unit ( relay ) just a quirky thing vw coolant light flashing when cold continuing use... To do something about diagnosing the cause of the heat saying the bold one happening! On how to diagnose VW engine coolant level is low, add engine coolant level is OK the prongs sense. Floating sensor in your coolant tank that triggers the warning light is red... Water until you can see the fluid rises to take up the space about 40 or below, above! As, nor should it be considered a substitute for diagnostic by auto... Brown wire and a green/blue wire anything above that and it 's cheap the vehicle and check the level! To your car by continuing to use this site you agree to use this site uses to! Are supposed to make the LED flash: 1 ) low coolant sensors when! Coolant and intake air temperatures are within 11°F ( 6°C ) of each other at startup, if the light... To contract all that day and no problems perhaps to the engine coolant level is too low after restart...

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