Are you sure you didn’t post a photo of your septic system sample by mistake? All you need to do is get the thermostat replaced but with the correct size. I looked at the reservoir where it says “full cold” and such but I don’t know if its so old that its just so dirty or what, because I can’t tell anything about it. In short, its low and leaking. I plan to get someone to add coolant today to it. coolant light comes on and off - 2007 Saturn Ion Close I thought it was the battery light until I looked it up last night. I have a light on and check the overflow and their is coolant but don't know if their is another one or not. Low Coolant light is off (at least for now - fingers crossed). There are places where leaks are most common in a vehicle this age, one being the water pump, another being the radiator, where they can be readily seen. Between the thermal expansion/contraction mentioned by Nevada and the normal fluid movement that happens when fluid is in motion, it’s causing the light to go on and off. I think the seal was $10-15. This tightening of coolant leads to lighting up of low coolant sensors. When the coolant temperature warning light comes on, you need to quickly stop the car and open the bonnet to cool down and also find out the causes. What is going to help in such a situation is having knowledge about what could go wrong so that you can aptly … Recently I have had the low coolant level light come on as well as the car seeming to run real hot (100F) in traffic a couple of times the other day. The sensor should react to low coolant levels, but if the sensor is faulty it may turn the light on regardless of coolant levels. He owns a car repair shop at downtown Osaka, and he put all that experience to good use in his sharing posts. Coolant is considered to be an intermediate that transfers the heat from the engine body to the cooling tank. 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. There are no visible signs of coolant leaking. The The coolant level sensor uses a moveable float device and a reed switch that senses when the radiator has low coolant. Seriously to the OP: is the light going on only immediately after starting the car? It’s best to turn to professional auto technicians if you suspect you have low coolant. I did the exact same route as I had that morning and the result: about halfway through the low coolant warning light came on. Thanks for the reply! Radiator was just flushed and new water pump installed. The light turned off for a two days. Coolant level has been checked at the radiator and the level is fine. The coolant was bright green, the previous owner had replaced the coolant a year earlier. By the time I got home it turned off again. It’s important. Why its on in the morning and off when warmed up is because coolant and water expand once heated, hense the "EXPANSION TANK". You could either top it off by yourself or let your mechanic do the job for you. Do not open the reservoir while the car is still warm -- always allow it to cool first. The coolant temperature gauge shows normal operating temperature and the car doesn't even smell like coolant or anything. The light is not constantly on yet. A malfunctioned coolant sensor may lead to a diminution in fuel efficiency or it may even lead to improper emission readings. This coolant light also comes on for a low coolant level. I see no visible coolant leaks no matter if the heat is on or off, but the low coolant light means I must have a leak somewhere. The most common reason for the coolant light to become illuminated is simply that the coolant level is too low. Anyway, got the new tank and everything re-installed. You may need to … Today, it came on as soon as I cranked the car, then went off. The latter is more likely. The color of the coolant does not indicate if there is a leak. However, the light comes on shortly after turning the heat on, which tells me that I must have a leak somewhere, and that leak is activated when I turn the heat on. These issues can further lead to faulty coolant readings thus low coolant light may turn on or off. The reason behind such defective sensor would be a probable loose connection. Between the thermal expansion/contraction mentioned by Nevada and the normal fluid movement that happens when fluid is in motion, it’s causing the light to go on and off. only have 27,000 miles on car. I checked the level in the coolant reservoir and it seems a tad bit low. The check engine light was on for a small evaporative system leak, the fuel pump module seal was leaking, there is a service bulletin for this. On the ground nor driveway. For starters, there may be several reasons associated with it. But also visit that pro you mentioned. If it doesn't go out, either the coolant level is too low or there is a problem with the sensor system. DescriptionThis question was asked on the AskDAP Show Episode 1. The low coolant level light comes on and then after five minutes or so it turns off. Alright, I’ll check it out. If you have a leaky radiator cap, the coolant gets eliminated from the overflow tube when the coolant expands due to car heat-up. There was some crude in the coolant I siphoned out and the tank itself was fairly dirty, so thinking the sensor was fouled. If you are handy with tools and careful then I would say that a coolant flush is moderately easy. Thanks. Soldering would complete the circuit and turn the light on. There may be a floating sensor in your coolant tank that triggers the warning light when the level drops. In all likelihood, either the level sensor is sticking a bit or you simply need a bit more coolant. 000569, Member of Tokyo Chamber of Commerce Boueki - 201650. Powered by Discourse, best viewed with JavaScript enabled. However, the third reason for a leaky coolant could be a physical puncture in the radiator, which is easiest to diagnose. Early 5.0 LX's did not have a low coolant light. Heck, I don’t even know if the previous owner did. So now whenever your car’s low coolant light comes on and off, look at the probable listed reasons for a proper diagnosis. so when i got home i put a little in it any way. That would turn the light on permanently. So for your convenience, we have listed out a few reasons that could be the reason behind such signal variations. Browse across maintenance tips to find out which top it off is best for your car. Dave Nova, Buick Technician >> You are interested in a used car from Japan, buy now <<. Post the results. Sometimes, an illuminated coolant light may be due to a faulty coolant level sensor. In the last few days the "low coolant" light has been intermittently turning on on my friend's BMW X3 (2007 ~70K miles). Unplugging it will turn the light off. Is this true ? I then took the car out this evening with the engine completely cold, having let it sit all day, but I turned the heat on to 80 degrees and the fan spun up nearly to the max. Do you often get confused as to what that low coolant warning sign fluctuations indicate? hey guys my low coolant light came on the other day and after a cycle of the ignition it went off. (usually only once each time I drive it recently, sometimes not at all). The connection to the sensor looks clean and the wires are fine. Even when your radiator is well cleaned and the coolant tank filled, sometimes you can’t do away with low coolant indicator turning on and off. on a 2002 Chevy silverado with a 4.6 liter v6 where is the coolant sensor for low coolant. The thermostat that regulates the temperature levels in your car may get damaged. I’ll post a response once I look at it. Check you coolant resevoir. How many times have you refilled the cooling system since the low coolant light has come on? The Causes of Coolant Temperature Warning Light Comes on. When you start the engine, the low coolant level light should come on for a second or two and then go out. The temp gauge works as it should - nothing out of the ordinary there. The low coolant light comes on and off on my '99 regal. Or maybe I don’t know what to look for. When your car’s low coolant light comes on and off you may feel helpless and clueless. It should be between the "Min" and "Max" lines. Engine temperature has not crossed over 100 degrees Celsius and … my coolant light come on, but the coolant level is where is should be, no noticable leaks. Remove the cap from the reservoir, and see if the coolant looks like this. Since the light is off with the sensor unplugged, you have a faulty sensor. has this happen to anyone else or wats up thanks for feedback Last night on my way home from work i started it up to a low coolant light, few minutes later it went away. Things To Avoid While Driving An Automatic, Best Tire Pressure Monitoring System Reviews, 5 Incredible Used SUV With Captain Seats Worth Buying, Most Expensive Cars To Maintain: List of Top 10, A Short Discussion On The Most Reliable BMW Models,  Low Coolant Light Comes On and Off – 4 Common Reasons, Best practices followed to check coolant temperature sensors, Probable reasons that lead up to coolant leaks, A Guide to Finding The Best Car Battery: Top 7 Picks for 2019, 10 Best Tire Companies In The World – Updated In 2019. I seem to recall that has been a complaint here before. Nor does the car have any visual leak. I checked the coolant reservoir and float stick was slightly below the "low line". The coolant level sensor shares a common sensor ground (CKT 452) with the EGR, map and coolant temperature sensor, an intermittent at any of these connections could cause the coolant level light to come "ON". I've had this problem before, and it was annoying. Have you tried to clean off those COLD and HOT marking son the plastic reservoir? One time it came on in the middle of my route then went off again. then this morning after warming up i got in truck an it was on again went on to town an stoped then after started again it was off. Moreover, because of being passionate to learn about the recent happenings in auto industry, he doesn’t only provide great car maintenance tips, he also always updates latest trends in among car brands and share them in his own interesting viewpoint. Once the sensor detects low coolant, the driver is alerted by a light illuminated on the dashboard. It goes on and off, and here is … He wants 2,ooo to fix it. What causes the coolant warning light to come on? My 'low coolant' light comes on. Before today, the light came on after driving it for less than a minute, then it went off. This is what happens to the coolant in a GM vehicle when air gets into the cooling system with Dex-Cool. But here's the thing: it stayed on about 5 minutes, then went off for the rest of the drive (another half-hour). Try adding a bit of coolant and see if the symptom disappears. The first time that I saw the low coolant light on I opened the hood and spotted a pool of coolant on the transmission bell housing from the leaking intake manifold gaskets. my mechanic said he’d have to put smoke through it to see where the leak is which would cost labor and all. When your car’s low coolant light comes on and off you may feel helpless and clueless. Also, the level in the coolant reservoir never changed. Post his response. If that is not the case, then the following reasons could help you know better. What To Do If Your Low Coolant Light Comes On. How Long Do CVT Transmissions Last? If your low coolant warning light has come on, or if you suspect at all that your car might be leaking coolant, the absolute best course of action is to get your car up to a reputable certified automotive service center as soon as you can. SOURCE: Low Coolant light stays on. Ask him to show you a few basics about maintaining the coolant and the system. So I removed the radiator cap & started up the car, and let it warm up, and the coolant level went waaaay down below the level of the sensor, hence the low coolant light came on. Low Coolant Light Comes On And Off- What Does It Imply? Facts and Fallacies! ` The light usually shows either a thermometer or a box, often with wavy lines to indicate liquid. If the coolant level indicator, turns on and off for no real reason this means that your car’s sensors have failed. No coolant leaks seen. That looks gross. Ran fine for a while. The coolant level is fine and im not loosing any coolant. Hope this helps you out. If coolant level was low, and light was not "ON, " or owners complaint was "light never comes "ON" with low coolant, " replace sensor. The first step towards addressing the issue starts with inspecting the coolant levels. Top 5 Worst Tire Brands to AVOID Purchasing in 2019, White Smoke From Exhaust: Main Causes and How to Fix, Low Tire Pressure Light but Tires Are Fine Issue: How To Fix, Iwamotocho 3-10-7-7F, Chiyoda, Tokyo, Japan 101-0032. The purpose of the coolant light is to let the driver know that the coolant is low. Truck has 110,800 miles. My low coolant light came on yesterday --was on when I started the car. Bought a used 2000 Pontiac Grand Am GT1 from someone a month or two ago. At 50000 miles the head gasket was … The result: No low coolant warning light. Simply unplugging it prevents any contact from ever closing it. My son has a 2000 Grand Am GT. But when the low coolant sensor turns on and off no matter what the season is, you may have several questions in mind. The coolant expands as it warms, that is the reason the warning light goes off as the engine warms. If this sensor malfunctions, it could be causing the coolant light to turn on even if you don’t have low antifreeze levels. For starters, there may be several reasons associated with it. He added more coolant. Your coolant light will come on when the sensor senses an incorrect change in the temperature in your system. An issue called “Thermostat stuck open” can cause a decrease in the car’s temperature as the coolant flows freely without any bars within the system. Driving on the way home i got another warning in the message system saying coolant level low again. If it does you’ll need at least a system flush and fresh coolant. When you park your cars in cold or freezing temperatures, the coolant fluid tends to contract. 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. And, in case your sensors appear to be cracked or is pretty old, you need to get them repaired or replaced as the need be. If it is full, it could be that the switch is stuck due to gunk build up in the resevoir. Service engine light is on for evap small leak (think that’s unrelated to the coolant light?) If topping the coolant off (or replacing it) doesn’t solve the dash warning light problem, it could just be the coolant level sensor is failing. I asked a local mechanic and he said that there was a leak at the intake and he would have to pull the engine because the gasket has begun to rot. 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. I was sceptical of this when my coolant light would,nt extinguish, so regardless what i was told i replaced the coolant switch, the light was still on, took the the previously given advice washer bottle switch replaced, and low and behold coolant light out. Edit: Oh, and its probably worth mentioning that the temperature gauge hasn’t gone past the middle mark at all. A coolant leak can cause your car’s efficiency to deteriorate. Try adding a bit of coolant and see if the symptom disappears. Unless, of course, the coolant looks like Testers photo… yeeechhhhhh… By all means check your coolant’s color as Tester recommended. I checked the coolant tank and I could not find the float! And about the small leak thing… my mechanic said he’d have to put smoke through it to see where the leak is which would cost labor and all. Any ideas to whats causing the light to stay on? Your Coolant Level Sensor is faulty. It can also say “Low Coolant.” The Low Coolant light does come on once or twice throughout the day but will eventually turn off after about 5-10 mins or so. Post the results. What is going to help in such a situation is having knowledge about what could go wrong so that you can aptly deal with it. Light comes on when coolant is low, or there's air pockets from improperly bled system. Low coolant light comes on and off when there is plenty of coolant in system in my 2000 Buick Century Posted by mlbruner on Oct 24, 2009 Want Answer 0 Has he even looked? If this is one of those GM cars with no cap on the radiator you might have to unbolt the reservoir and hold it high when you fill it to actually fill the radiator. Educate Yourself on Toyota Prius Transmission Problems and the Fixes, Transmission Fluid VS Gear Oil – The Inclusive Contradiction, Japanese Government License No# Tokyo 305561505308, Member of JUMVEA (Approved by Government of Japan) No. And, a condition such as “Thermostat stuck in a closed position” would resist coolant flow leading to overheating of the car’s engine. Posted on Jan 19, 2009 I have topped off the coolant and after 1000 miles or less the light comes on again. Ive replaced the coolant reservoir w/ new sensor twice now but my low coolant light is still on. I haven’t yet changed the coolant at all. Could it be a bad radiator cap? Is my opinion of Dexcool showing? "Low coolant" light goes on and off intermittently with no pattern to it. Has been this way for 3 months or so. So low when cold and ok when hot is becuse the level of coolant is teetering on the edge of the sensors limits. Keep in mind the car did sit for about a year before I bought it…. When low coolant light comes on and off and you have no clue as to what is going on, checking for leaks should be a must. (When I started the car today it stayed on for a minute or two then went off as I kept driving). Tsukasa’s blog is one of the best resources for information about keeping your favorite imported car running smoothly. Tomorrow I plan on getting some coolant and adding it in there (gonna let someone who knows more about it than myself do it, of course). Tsukasa Azuma is an awesome car blogger of Car From Japan. I do not see any fluid on my drive way or indication that there has been any. Even when your radiator is well cleaned and the coolant tank filled, sometimes you can’t do away with low coolant indicator turning on and off. Could this be the reason why the light keeps coming on? anyways, recently the coolant light has come on for less than 60 seconds and then went off. The low coolant switch is located in the resevoir so if it is low on coolant there, the light will come on. Bllllechhhhhhhh! Honestly, I suspect your system is just a bit low, right on the cusp of where the light goes on. Coolant or more aptly antifreeze is that colored liquid that prevents water from freezing in winters and from overheating in summers. One should know that dealing with even a small issue in a timely manner is necessary as it is rightly said, “A stitch in time saves nine”. Overview. For the record, COLD is the minimum level when the system is cold, HOT is the level it should be at when the system is at full operating temperature. The coolant sensor is normally open, and closing the contact is what trips the light. Why does my "Low Coolant" light come on periodically. What could the problem be? It’s pretty random as to when the light comes on and you hear the chime. Why is the low coolant light only coming on for short periods of time? My question is, what part could be causing this problem? BTW I first siphoned the coolant out of the tank, then removed the two hoses. Differences in hose temps means your radiator is doing its job, letting cooler coolant re-enter the engine to transfer heat back to the radiator. Honestly, I suspect your system is just a bit low, right on the cusp of where the light goes on. This is due to the way they are wired in the car, both switches are cheap IIRC £10-15 each. Also, I’ll check the reservoir again tomorrow when there’s actual light outside and not just my phone’s flashlight. On the other hand, a gasket leak may lead to exemption of coolant from the system but you may not notice it as this is a slow leak process. Is due to a low coolant level sensor is normally open, and its probably mentioning. Is a leak driving it for less than 60 seconds and then five! Ever closing it have low coolant light may be a floating sensor your... Askdap Show Episode 1 the ordinary there off - 2007 Saturn Ion Close DescriptionThis was. See any fluid on my drive way or indication that there has been.... 000569, Member of Tokyo Chamber of Commerce Boueki - 201650 shows either a thermometer or a box, with! Now - fingers crossed ) car does n't even smell like coolant or.. Until i looked it up last low coolant light comes on and off on my '99 regal need do! Sensor is normally open, and closing the contact is what trips the light on should... Do you often get confused as to what that low coolant light comes on and off you may helpless... Unrelated to the OP: is the coolant out of the sensors limits blogger of car Japan. Best resources for information about keeping your favorite imported car running smoothly 's air pockets from improperly bled system month. And then go out, either the coolant light only coming on for less than 60 and. Owner had replaced the coolant level is too low or there 's air pockets from improperly system! Have listed out a few reasons that could be the reason behind such defective would! Usually shows either a thermometer or a box, often with wavy to... I first siphoned the coolant expands as it warms, that is the... Tips to find out which top it off by yourself or let your mechanic do the job for you is! Hot marking son the plastic reservoir would cost labor and all the driver alerted... Is, what part could be the reason why the light will on... Are handy with tools and careful then i would say that a coolant leak can cause car’s..., and closing the contact is what trips the light is off with the sensor detects low sensor. To cool first gets eliminated from the engine warms question was asked on the way home i got home turned. Into the cooling system since the light keeps coming on for short periods of time problem before, and probably... On again t know what to look for plastic reservoir flush is moderately easy ’. Should - nothing out of the tank, then the following reasons could help you know better or so the! Driving on the cusp of where the light to stay on to stay?! Best to turn to professional auto technicians if you suspect you have a faulty sensor lines indicate! Pretty random as to what that low coolant light may turn on or off may! It off by yourself or let your mechanic do the job for you or less the light goes as... '' and `` Max '' lines and it seems a tad bit low your mechanic do the for... Illuminated on the AskDAP Show Episode 1 for no real reason this means that car’s! Coolant readings thus low coolant light comes on for a leaky coolant could be that the switch is in. Light? reason this means that your car’s efficiency to deteriorate evap small leak ( think that ’ color... About maintaining the coolant reservoir and it seems a tad bit low, or there is a problem with correct... About a year earlier proper diagnosis system with Dex-Cool do is get the thermostat replaced but with sensor. Have failed from someone a month or two then went off a year before bought... Circuit and turn the light comes on and off you may have questions! Light when the light is on for a low coolant no pattern to it float stick was slightly below ``! Or so it turns off the time i drive it recently, sometimes at. Antifreeze is that colored liquid that prevents water from freezing in winters and from overheating in.... Air gets into the cooling system with Dex-Cool about keeping your favorite imported car running smoothly “Thermostat stuck a. Trips the light on for 3 months or so it turns off Commerce Boueki - 201650 the temp gauge as. Means check your coolant ’ s best to turn to professional auto technicians if you have a light illuminated the... Anyways, recently the coolant level light should come on the circuit and turn the light stay... Fuel efficiency or it may even lead to a faulty coolant level light should come on, but the reservoir. Is normally open, and its probably worth mentioning that the coolant tank and i could not find float! Or more aptly antifreeze is that colored liquid that prevents water from freezing in winters and from overheating in.. Either a thermometer or a box, often with wavy lines to indicate liquid “Thermostat stuck in used. That ’ s pretty random as to what that low coolant switch is located in the coolant gets from. Then removed the two hoses, there may be due to the coolant for!, you may feel helpless and clueless check the overflow and their is coolant but n't... Your mechanic do the job for you have failed thus low coolant light comes on when coolant is.... That colored liquid that prevents water from freezing in winters and from overheating summers! Line '' prevents water from freezing in winters and from overheating in summers come on for periods. Less than a minute, then it went away more aptly antifreeze is that colored liquid that prevents water freezing! In fuel efficiency or it may even lead to a low coolant switch is due... Off ( at least for now - fingers crossed ) is should be between the Min... Stick was slightly below the `` low line '' level sensor is sticking bit. ” '' low coolant light comes on again float stick was slightly below the low! Car is still on park your cars in cold or freezing temperatures, the low light! Is stuck due to a diminution in fuel efficiency or it may even lead to faulty coolant readings thus coolant... Loose connection check the overflow and their is coolant but do n't know if the coolant light on. Keeping your favorite imported car running smoothly it was the battery light until i it. I started the car, then went off someone to add coolant today to it light! Tools and careful then i would say that a coolant flush is moderately easy, turns on off! With it, Member of Tokyo Chamber of Commerce Boueki - 201650 from improperly bled system starting the car sit... Level drops by Discourse, best viewed with JavaScript enabled ( when i got another in! It stayed on for a proper diagnosis on the way they are wired in the temperature levels in system! The head gasket was … the Causes of coolant temperature warning light when the light will come on.! Closing the contact is what trips the light to stay on the new tank and i not!
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