An engine coolant temperature sensor or ECT measures the temperature of the liquid coolant. It then sends that information to the car’s computer brain, which can adjust the engine to maintain an even temperature. Its been fine for 7 or 8 years, maybe 40,000 miles, and i haven't changed anything but shocks since then. It fired right up on a rebuilt Ford 302 engine, but I'm having some issues with the coolant temp sensor. Check for the correct socket size (it is usually 19 millimeters) and use a drive socket to loosen and then remove the sensor from the engine block. These cookies ensure basic functionalities and security features of the website, anonymously. The coolant temp senders on these engines don't fail often, my bet is there is wiring problem. A coolant sensor that always reads hot may cause cold driveability problems such as stalling, hesitation and rough idle.This also affects engine performance and fuel economy. When the engine coolant temperature sensor fails, it will send inaccurate information to the vehicle’s computer, causing the computer to react to false operating conditions.This will cause the engine to consume more fuel than normal, depleting fuel mileage, and causing black, sooty smoke from the engine under … Combustion is the chemical process of releasing energy from a fuel and air mixture. And when your vehicle is running colder than it normally should, its symptoms are: … Engines are highly sensitive, especially to inappropriate air-fuel mixtures at idle. As coolant is pumped through the engine block, heat is transferred into it. Found inside – Page 91If one of these sensors goes bad, the air/fuel mixture will be wrong. ... Position Sensor, Engine Coolant Temperature sensor, and the Mass Air Flow sensor. The easiest way is to plug in an engine scanner and see what temperature the ECT is reading at. If you notice that your engine overheats, the coolant temperature sensor could be the problem. When this part malfunctions, it can spell trouble for your car or … These cookies will be stored in your browser only with your consent. Found inside – Page C-1027Bad contact in connector . ... Temperature sensor faulty or not connected . ... Coolant temperature sensor faulty . terminals 1 and 2 in the connector ( see ... Eventually I scanned it with VCDS and found a fault code for the coolant temperature sensor in both the engine controller and instruments. The coolant temperature sensor can also fail in a manner that causes it to send a permanently hot signal. Dec 23, 2011. The short answer is, no, a bad or faulty coolant temperature sensor will not cause your car to not start. This can cause the fuel mixture to be vibrant such that during combustion, the fuel can’t be adequately consumed within the chamber. This will cause the automobile to use up more fuel than is necessary, thereby reducing fuel economy. Found inside – Page 829In detail, the software module acquires the temperatures via thermal sensors and calculates the coolant temperature at specific points. Check Readings. Poor fuel economy. An illuminated Check Engine Light is another symptom of a potential problem with the coolant temperature sensor. By Mia Bevacqua. Fax: 330-434-3634, © 2021 Gearstar Performance Transmissions. If the coolant temperature sensor goes bad it can send a false signal to the computer and throw off the fuel and timing calculations. And this will ultimately hamper engine performance. The coolant temperature sensor, also known as the coolant temperature switch, is an engine management system sensor that is used to monitor the temperature of the engine’s coolant. Instrument panel temp gauge is indicating normal, so the coolant temperature is not unusually low, such as 90F, or too high. All of a sudden my temp gauge is not working (it always shows the coldest reading). A diagnostic code reader can be used to check for … Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. This signal is then sent to the computer so that changes can be made to the engine’s timing and fuel calculations for optimal performance, as engines require more fuel when they are cold, and less fuel when they are fully warmed up. If the coolant temperature sensor goes bad it can send a false signal to the computer and throw off the fuel and timing calculations . It is not uncommon for the coolant temperature sensor to fail and send a permanently cold signal to the computer. As example if the sensor was seeing 260 degs the ohm meter should show about 77 Ohms. The trapped air will make the ECT sensor read LOW. Get a fair & transparent quote instantly before booking. The easiest way is to read the trouble code memory and check the value from the sensor, to make sure it's a possible value. Learn why and symptoms of a bad sensor. It is absolutely imperative to make sure that all of your sensors are functioning properly and reporting correct data. Its easy to use. It is not uncommon for the coolant temperature sensor to fail and send a permanently cold signal to the computer. You will find it installed conveniently on a plastic hose on the coolant’s inlet. Check Engine Light Flashes. We'll assume you're ok with this, but you can opt-out if you wish. Due to a faulty ECT sensor, the fuel mixture will adjust. That’s why, a visual inspection of the (ECT) sensor, will sometimes reveal a problem. Common symptoms of a bad engine coolant sensors are overheating, hard starting conditions, poor idle, check engine light ON and the electric fans do not work properly. Found inside – Page 488Bad coolant temperature sensor • Bad connectors or wiring in the collant temperature sensor circuit Faulty system computer Low - temperature faults can be ... Found inside – Page 97A mechanic replaced the coolant - temperature sensor , but the problem remains . Charles Morrow Palm Harbor , FL A bad coolant sensor usually is the problem ... One of the first symptoms associated with a problem with the coolant temperature sensor is poor fuel economy. May 2, 2007. If your vehicle experiences any of the symptoms above you should check out your ECT sensor. As you can see, temperature plays such a crucial role in the performance calculations of your engine. Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. If it is not low, then you may have a level sensor problem. Overheating EngineAn overheating engine should give off several warnings like a high temperature reading on the dashboard gauge and… Advertisement cookies are used to provide visitors with relevant ads and marketing campaigns. And the light will not go off until a specialist readily addresses the issue. Found inside – Page 2-130וה TEMPERATURE SENSOR TA357249 NOTE Coolant temperature must be below 55 ° F ... If ether starting aid injector valve clicks , temperature sensor is bad . When you’re driving, your engine goes through combustion. Sales & Info: 330-434-5216 V6 coolant fill procedures. As the engine heats up, the resistance falls because most vehicles use a negative temperature coefficient sensor. Found inside – Page 446TROUBLE CODE 14 SHORTED COOLANT SENSOR CIRCUIT IF THE ENGINE HOT LIGHT IS " ON ... -Restricted water jackets Bad coolant temperature sensor • Bad connectors ... Check all of the sensor terminals for proper connections and then trace the wires and inspect for any cuts are tears. The engine may now not turn over due to overheating until the engine stopped seized the motor and coolant may... any problem with the coolant temperature sensor. But opting out of some of these cookies may affect your browsing experience. In this case, your car will tell you that your engine is overheating when it actually is not, meaning you’ll likely have a dashboard warning light on and your car may not operate properly. Most automobiles come with two different temperature sensors for the fans, engine management and dashboard gauge. Where is the Coolant Temperature Sensor Located? Found inside – Page 166... motor Bad MAP / MAF sensor Bad coolant sensor Leaking injector Bad fuel ... Sensor / Switch A Circuit Intermittent Insufficient Coolant Temperature for ... This is a pointer that something is wrong with your coolant temperature sensor and must be checked out by a certified professional. If the ECT signal is 0V, then you have short circuit and the sensor isn’t getting power; however, if the signal voltage is 5V then there is an open circuit. Step 9: Check For Debris. An ACDelco Professional, premium aftermarket Engine Coolant Temperature Sensor is the high quality replacement ideal for many vehicles on the road today. Hello - coolant temperature sensors are variable resistor devices - the colder the coolant temperature, the greater the electrical resistance value reported to the engine computer. The most common reason your temperature gauge staying on cold is a faulty coolant temperature sensor. (Picture #2) -Pull upward on the locking tab. The tip of the (ECT) sensor protrudes into one of the cooling system passages; and is immersed in coolant. One of the first and most common symptoms of a bad engine coolant temperature sensor is significantly reducing your vehicle's fuel economy. Let the engine run for a full two … 2011 Sportsman 500 HO Touring: Polaris 3500 lb. The V6 is very bad about trapping air inside the motor. If the computer detects an unsavory development with the sensor’s circuit or signal, it may set off the ‘Check Engine’ light. Engine will have bad mileage and low power and could overheat when a coolant temperature sensor is bad. This occurs to prevent overheating, which can damage the engine severely. This leads to the burning up of your vehicle’s exhaust pipe, thereby causing black smoke. Found inside – Page 131If the test light does glow , the trouble lies with a faulty coolant temperature sensor or timer , or a broken wire . Test the coolant temperature sensor ... Ford E-350 Super Duty V8-5.4L - Vehicle Engine Electrical - Placentia, California. They will be able to diagnose your vehicle and determine if you need a coolant temperature switch replacement. If you know what ECT sensor you have, then you should be able to find a table that will correlate the resistance to the water temperature. Found insideAlso, when an actuator is suspected as being faulty, make sure the inputs ... An ECT sensor signal that indicates a coolant temperature well below the ... Found inside – Page 105The engine may not deliver as been set . lems ( bad rings , bad valve seats ... honored tradition of tuning a coolant temperature sensor , manifold their ... So what are the symptoms of a failing ECT sensor? Found inside – Page 113Newer engines have coolant temperature sensors that supply the powertrain ... If it is accidentally dropped or has a bad switch or loose connections, ... - I'm probably just paranoid but ever since I got my 96 f150 a year ago I've noticed something. by themechanic. The engine temperature signal is used by the engine control module to adjust the air/fuel mixture and ignition timing. Coolant sensor wiring damage like chafing or rodent damaged. LEARN MORE. The heater may have started to go cold due to the engine getting low on coolant and from the overheating. -Disconnect the Engine Coolant Temperature (ECT) sensor electrical connector. This will cause the computer to think the engine is cold, even when it is not, and as a result will use more fuel than necessary. The engine coolant temperature (ECT) sensor test is simple and can help you fix your car faster. You should check the hole left by the bad coolant temp sensor for any dirt or debris you can remove. Found inside – Page 520a good sensor pattern measured with a D50 on the left, and a bad pattern on ... Engine Coolant Temperature Sensor The PCM will look at the engine coolant ... Either case is not good and would cause the ECT to not function properly. This is because it plays a crucial role in numerous calculations that ultimately affect your engine’s performance. Found inside – Page 35They are a start-pickup coil, run-pickup coil, coolant temperature sensor, air temperature sensor, ... Lack of continuity indicates a bad ground connection. Some vehicles’ coolant temperature sensors control the electric cooling fans. Replacing one requires a new valve, some basic tools, and fresh coolant. If the coolant temperature sensor fails and sends a cold signal to the computer, this can confuse the computer and cause it to unnecessarily enrich the fuel mixture. Most (ECT) sensors operate using electrical resistance, to measure the temperature of the coolant. Symptoms of a Bad Coolant Temperature Sensor Check Engine Light. Signs Your Engine Coolant Temperature (ECT) Sensor Is Bad. The engine uses many sensors to monitor its operation and health. Flat rate pricing based on labor time and parts, Trusted mechanics, rated by thousands of happy car owners, Hand-picked, community-rated professionals, Over 25,000 topics, from beginner tips to technical guides, Check cars for recalls, common issues & maintenance costs, Optimize fleet uptime and compliance via mobile vehicle repairs, Partner with us to simplify and scale fleet maintenance. Cheking water sensor. Found inside – Page 52Other possibilities include a faulty air or coolant temperature sensor , a manifold absolute pressure ( MAP ) sensor that's lost its marbles or even a bad ... Info. And this implies that if the coolant temperature sensor malfunctions, it may translate very quickly to engine performance hiccups. I think if you have a stock gen3 and are using the turbo vsv you should also see the boost limited to the cold start boost which is 9psi. A coolant temperature sensor remains one of the most vital engine management sensors. Most of the time, P0118 is going to be caused by a bad temperature sensor. © The Check Engine Light will remain on until the issue is addressed. This engine management system sensor operates by using electrical resistance to measure the coolant’s temperature accurately. Jul 27, 2007. A typical engine cooling temperature sensor is a Negative Temperature Coefficient (NTC) thermistor, which means its electrical resistance decreases when the temperature increases. Over time these sensors can suffer from wear, loosened connections due to vibration, and corrosion from being in the environment. The cookie is used to store the user consent for the cookies in the category "Performance". If you suspect the sensor isn’t working properly, you can test a coolant temperature sensor or simply replace it. Hey, here is the problem, a 99 honda civic dx. It can also be caused by bad wirings between the cluster or the sensor. This part, called a coolant temperature sensor, is responsible for measuring how hot the coolant is getting. The engine coolant temperature sensor measures the temperature of the coolant in your engine. It is not uncommon for the coolant temperature sensor to fail and send a permanently cold signal to the computer. If your sensor has either of these readings, there are steps you can take. If your vehicle won’t start when cold, the easiest way to check the engine coolant temperature sensor is to depress the gas pedal while cranking the engine. If it starts, that’s a pretty good sign the sensor is off. Found inside – Page 903A bad ECT sensor can also cause cold performance problems . Symptoms can include poor idle , stalling , and hesitation or stumble on acceleration . Repairs covered by 12-month/12,000-mile warranty. This will enable you to find the measurement values that a functioning coolant temperature switch should exhibit. Messaged Inputs. The Coolant Temperature Sensor's Function. Found inside... SENSOR TEMP $ENSOR FUEL FILTER z - #OE - [-] E-UEuN IHRQUILEPOSITION off; ... If the information sent to the computer is bad, so is the operation of the ... 1998 SATURN SL1. Copy link. This will cause an increase in resistance as the temperature rises. You can do it at home using a digital multimeter and a cooking thermometer. One for the dash and one for the PCM. Let’s take a quick look at what signs you can expect. 135,000 MILES. This will cause the engine to vibrate or … However, if your vehicle only has a single coolant temperature sensor and it becomes faulty, your electrical fans may not function at all. If the coolant temperature sensor goes bad it can send a false signal to the computer and throw off the fuel and timing calculations. It is common for the coolant sensor to fail and send a permanently cold signal to the ECU. 2007 Lexus ES350 Coolant Temperature sensor replacement showing how to remove the coolant temperature sensor on a 2007 lexus es350, this may also apply to certain year avalon highlanders and other Toyotas with the same V6 engine. One of the first symptoms associated with a problem with the coolant temperature sensor is poor fuel economy. Can't remember if the sensor is single or double wire. Email: [email protected] If your check engine light starts flashing, this could also indicate a faulty coolant … Found inside – Page 186wire between the sensor and the PCM. This causes the signal to the PCM to indicate a very high temperature, usually above 250° F. A bad coolant sensor can ... This includes changing the engine’s timing as well as the fuel calculations for premium performance. I’ll look for loose wiring connector. Tap to unmute. Found inside – Page 131If the engine runs poorly when cold or only when warm, perhaps the coolant temperature sensor is bad. With the engine at the problem temperature, ... A dip in fuel economy. In the case of a faulty ECT, I’ll check things like: Coolant level, insufficient coolant will cause the sensor to operate erratically if at all. The coolant temperature sensor can fail and transmit cold signals to the computer. But occasionally it still won’t start…in the evening, after I get home and it sits for 2 hours. You also have the option to opt-out of these cookies. Then compare the value with the correct ohm-value – at a given temperature – in your repair manual. This will reduce fuel economy, and may hinder engine performance. Found inside – Page 6-410SHIFT POINTS TOO HIGH OR LOW 1 ) Bring engine coolant temperature and transmission fluid to normal operating ... If so , there is a faulty speed sensor No. Watch later. The computer is calculating an air/fuel mixture that is too lean. engine coolant does need to … This could be severe corrosion around the terminal; a crack in the sensor or coolant leaksaround the sensor. You can now remove the bad coolant sensor. 2007 Lexus ES350 Coolant Temperature sensor replacement showing how to remove the coolant temperature sensor on a 2007 lexus es350, this may also apply to certain year avalon highlanders and other Toyotas with the same V6 engine. Save Share. Found inside – Page 4-33Bad operator panel . TROUBLESHOOTING Coolant Temperature , Hydraulic Oil Temperature 1. Remove the control wire from the switch ( sensor ) and put it to ... It should peg the gauge if … Plus a professional shop would use a infrared thermometer to check engine real temp. Found inside – Page 121On some 1993 3.0-liter Dodge Shadows and Caravans—and Plymouth Sundance and Voyager models—a bad coolant-temperature sensor connector may be the cause of ... This will cause the automobile to use up more fuel than is necessary, thereby reducing fuel economy. Our certified mobile mechanics perform over 600 services, including diagnostics, brakes, oil changes, scheduled mileage maintenances, and will come to you with all necessary parts and tools. So, if you find yourself in a situation where you can’t remember the last time that the coolant has been changed, it may be worth a shot to just change it and see if you get lucky. A faulty sensor can cause the fuel mixture to adjust. Otherwise there are electrical troubleshooting steps that can be taken above. If the value does not tally, it means you need to replace the coolant temperature sensor. If your vehicle comes with two sensors, the one that transmits signals to the control unit is often known as the coolant temperature sensor. Most coolant temperature sensors operate using electrical resistance to measure the temperature of … GearStar Performance Transmission While your car will start, it is not good to have a non-working coolant temperature sensor for long. -Remove the ECT sensor. An engine coolant temperature sensor or ECT measures the temperature of the liquid coolant. While a failing engine coolant temperature sensor may give a permanent cold signal, it can also malfunction in a way that sends a hot signal when your engine temperature is safe. Thereof, what are the symptoms of a bad coolant temperature sensor? This will reduce fuel … Share. Analytical cookies are used to understand how visitors interact with the website. Its exact location also depends on its overall design. Replaced, never had a problem since. Engine block sealer can be a quick and easy alternative for minor cases. For additional information, refer to Section 303-03. To prevent this, the engine monitors the temperature of the coolant via an engine coolant temperature sensor or ECT for short. It can be found on amazon here. Found inside – Page 133The high-school kid across the street, who thinks he's hot stuff because he's taking auto shop, says the computer has a bad temperature sensor. This category only includes cookies that ensures basic functionalities and security features of the website. Necessary cookies are absolutely essential for the website to function properly. The cookie is used to store the user consent for the cookies in the category "Other. Answer (1 of 3): If you unplug the coolant temperature sensor the PCM will see the lack of signal as a extremely low coolant temp. Your symptoms are a dead ringer for a bad engine coolant temperature sensor (ECT). ECTs are commonly supplied with a 5 volt reference voltage. FarmBoss said: I had a bad engine coolant temperature sensor. This post discusses some of the common symptoms of a bad coolant temperature sensor. We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits. The engine coolant temperature (ECT) sensor test is simple and can help you fix your car faster. The heater valve is integral to a vehicle’s cooling system. An overheated engine can warp pistons, cause leaks, and even melt components. A bad engine coolant temperature sensor affects engine performance: It may cause a constant lean air/fuel mixture, causing the engine to … The (ECT) sensor, is an engine management system sensor; that is used to monitor, the temperature of the engine’s coolant. The coolant temperature switch – otherwise known as the coolant temperature sensor – is primarily responsible for monitoring the engine coolant’s temperature. What are the symptoms related to a bad engine coolant temperature sensor? The most common symptom of a bad ABS sensor is an ABS warning light showing up on your dashboard. Cooling fan stuck on. If the coolant temperature sensor goes bad it can send a false signal to the computer and throw off the fuel and timing calculations. If the temperature is off the range, check the wirings of the sensor or replace the engine component. Rendered my sr20de Undrivable. Strangely, the temperature reading was normal (around 90 C) on the instrument cluster and on the various measuring blocks in VCDS. engine coolant does need to be drained to avoid it spilling from the hole. Stuck open thermostat/faulty thermostat. They said it was OK to drive, but for some reason I don’t believe them. Thanks, Stew . When the engine is cold, the resistance is high. This website uses cookies to improve your experience. Click to see full answer. Signs of a Bad Temperature SensorDecrease Fuel Mileage. The temperature sensor is responsible for sending feedback information to the computer at specific resistances which will vary the engines power output causing the fuel mileage ...Check Engine Light. A cars computer is capable of reading the values of any sensor at any given time. ...Engine Will Overheat. ...More items... Found insideCOOLANT-TEMPERATURE SENSOR/ WATER-TEMPERATURE GAUGE NOT WORKING Coolant-temperature sensors make use of thermocouples to change the amount of amperage ... 132 N. Howard St, Akron, OH 44308 One of the most damaging situations an engine can be exposed to is overheating. We also use third-party cookies that help us analyze and understand how you use this website. The temperature sensor? Few drivers hardly notice this crucial coolant temperature sensor symptom. It does not store any personal data. A bad coolant temp sensor can cause the engine temperature readings to be either too high or too low. When the coolant temperature sensor fails, the problem may cause the check engine light to be illuminated and will likely trigger a fault code. Very personable and took the time to inspect the vehicle and explain what he found to be the problem and explained it thoroughly. Used this to replace fix a check engine light for a bad engine coolant temperature sensor in my 1995 Buick Roadmaster. The signal generated is automatically transmitted to the computer so that necessary changes can be made. Found inside – Page 45The coolant - temperature sensor may be signaling a very high coolant temperature , and allowing the a / c to come on ... Check for a bad alc clutch relay . 98 STAURN. Found inside – Page 108Digital voltmeters with bar graphs make it much easier to recognize a bad TPS ... ECM GROUND TEMP SENSOR Signal wire — The TPS sends a varying voltage ... Engine coolant can cause the code to throw if it gets corroded enough. Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Step 8: Take Off the Sensor. Warning Signs of a Failing Engine Coolant Temperature Sensor. Found inside – Page 36TECHNICAL TALK CHECKING AN ECT SENSOR - IF YOU CAN FIND IT ! NOW AVAILABLE IN DVD There's also a 16 - vehicle demonstration version of ESI ( tronic ) for ... However, the coolant temperature sensor is often located right on the, Diagnosing a Malfunctioning Coolant Temperature Sensor, 16-Speed: More Gears Than You Can Shake Three Sticks At, 2011 Chevy Silverado – Project Blue Bomber Finale, A High-Performance Trans for Supercharged V-8s, A New Transmission for the ‘ol Sedan Delivery, An Overview of The GM Turbo 350 Performance Transmission, 5 Symptoms of a Bad Coolant Temperature Sensor, The Ultimate Guide to the 4L80E Transmission, History of the 4L60E and How It Stacks Up Against the 4L80E. Aug 12, 2008. if the coolant temp sensor is broken you will stay in open loop (cold start) and should run rich. Shopping. Fast, free online quotes for your car repair. I have heat and there is ample coolant in the engine. No matter how long I drive the truck, 20 minutes or 4 hours straight, the temp gauge only goes up to the the N on normal. A faulty coolant temperature sensor may cause an engine to run hot and increase fuel consumption. If you noticed any of the symptoms mentioned above, you … A bad coolant temp sensor will send a false reading to the car computer and disrupt accurate gas and timing calculations. Since the resistance measured correlates with a temperature, the ECT is able to monitor the temperature of the coolant by converting the electrical resistance reading into degrees Fahrenheit. If the computer detects that the engine’s temperature is too high, it will automatically scale back engine performance settings. A bad engine coolant temperature sensor can really screw up starting and performance. A faulty coolant sensor that always reads cold may cause the fuel control system to run rich, pollute and waste fuel. It is more likely that the truck will start better with a bad CTS as the computer will likely read the bad sensor as a cold condition. Found inside – Page 447Who is correct? a Tech A b Tech B c Both A and B d Neither A nor B 3 Technician A says that a bad electronic coolant temperature sensor could cause the ... Keep in mind that many (ECT) sensor problems; are more often due to wiring faults and loose or corroded connectors than failure of the sensor itself. To prevent this, the engine monitors the temperature of the coolant via an engine coolant temperature sensor or ECT for short. This device works on the principle of dependence of potential difference in temperature. One of the first symptoms associated with a problem with the coolant temperature sensor is poor fuel economy. 2 12A648 ECT sensor. While your car will start, it is not good to have a non-working coolant temperature sensor for long. In some cases, it can also be a stuck thermostat causing the engine not to heat up properly. A typical engine cooling temperature sensor is a Negative Temperature Coefficient (NTC) thermistor, which means its electrical resistance decreases when the temperature increases. If you are getting a coolant sensor message on the VIC (screen above the shifter), then the sensor for that is located in the coolant overflow tank. This engine management sensors assumes the engine coolant temperature sensor symptom something that is too high or high! Ect to not function properly engine ” light bad coolant temperature sensor trouble code discusses some of readings... A possible problem with the coolant via an engine can be so severe that driving vehicle! Is why you shouldn ’ t working properly, you consent to record the user consent for the coolant up! Computer may unbalance the timing and fuel economy be checked out by a certified professional this! Responsible for monitoring the engine ’ s coolant temp sensor needs to be the same—roughly equal to computer! Took one star off because it plays a crucial role in numerous calculations that ultimately affect your engine goes combustion... Be signaling a very high coolant... bad switch s take a quick easy! Will automatically scale back engine performance settings time to inspect the vehicle to drive, but you do... Or damaging its components up of your sensors are crucial for protecting your engine coolant sensor a. Control the electric cooling fans professional or experienced technician to inspect your vehicle as soon as without. Example if the sensor isn ’ t believe them analyzed and have not been classified into category. Provide information on metrics the number of visitors, bounce rate, traffic,... Non-Working coolant temperature sensor some basic tools, and hesitation or stumble on.... To prevent overheating, and hesitation or stumble on acceleration vital engine management sensors it a! For long in such a crucial role in the category `` performance '' calls... Pistons, cause leaks, and fresh coolant not tally, consider checking the and... And explain what he found to be caused by a certified professional coolant the. Vehicles the computer and stimulates it to enrich the fuel control system to rich. `` other automobile and push you to have it checked out thoroughly fuel when they are cold but less! Advertisement cookies are those that are being analyzed and have not been classified into category! Near the thermostat opens and pushes coolant through the system if left unattended, it may translate very quickly engine... Computer brain, which can adjust the engine to misfire or overheat other recommendation would. Here are some possible causes of the most vital engine management sensors falls because most use., is responsible for measuring the temperature of the cooling system passages ; is. Housing ( center/front of engine just above belt to measure the temperature of the p0128 code sensors and calculates coolant... As yet week between 7AM-9PM 2 hours can fail and send a false to! Probably just paranoid but ever since I got my 96 f150 a year ago I 've something. Unusually low, you can also make bad coolant temperature sensor of an OBD2 Scanner to look for related trouble codes problem! Faulty if the coolant temperature sensor, other times it is responsible for the! A sensor went bad on my 93 YJ make the ECT to not function properly signs you can.. Cookies track visitors across websites and collect information to the computer cookies is used to understand visitors! Signals permanently assumes the engine coolant temperature sensors for the dash and one for the coolant temperature sensor U.S..... Into it may cause an actuator to appear faulty opting out of of! Gas and timing calculations it with VCDS and found a fault code for the severely! A given temperature – in your browser only with your consent choke the o2 from my car, so coolant. Noticed something located inside your vehicle is very bad about trapping air inside motor... A possible problem with the coolant temperature switch remains one of the coolant temperature sensor is malfunctioning Roadmaster! Multimeter and a cooking thermometer more fuel when they are cold but require less when fully warmed up the.... Some issues with the sensor isn ’ t start…in the bad coolant temperature sensor, after I get home it... Controller and instruments reader can be exposed to is overheating so that changes... Or its related systems is wrong with your automobile and push you to have a non-working coolant temperature sensor single. Misfire or overheat hesitation or stumble on acceleration serious damage to your car repair example if the is. Engine severely example if the sensor isn ’ t working properly, you have a leak and need get. Is on the various measuring blocks in VCDS a plastic hose on the ground signal the... Calls in over 2,000 U.S. cities bad on my 93 YJ is replaced regularly any... This action confuses the computer to erroneously counterbalance the signal generated is automatically transmitted to the use of the! Hot '' on the display idle, stalling, and the response of the computer and throw off the,... Could imply a hitch with the coolant temperature sensor symptom detail, the statements expressed above are only for purposes. Took one star off because it 's not us made at home using a digital multimeter in! Uses cookies to improve your experience while you navigate through the system followed! Failure to start is darn near impossible from a fuel and timing.... A 99 honda civic dx a fault code for the model of your sensors are functioning properly and correct. The air/fuel mixture and ignition timing if you notice that your engine from overheating and determine if you notice your! Will send a permanently hot signal sorts of problems for your car because it 's us! For the coolant temperature sensor to fail and send a permanently hot signal your sensor... Or overheat bad VIC powertrain control module if single ground the wire if. Either case is not uncommon for the coolant temperature sensor and the air... May have an effect on your browsing experience signs you can see, temperature plays such crucial... And corrosion from being in the engine temperature rises sort of next to the so. Is it Important pollute and waste fuel a visual inspection of the of! And increase fuel consumption engine not to heat up properly sensor at bad coolant temperature sensor given.... Monitoring the engine ’ light suddenly comes on, this shouldn ’ t you! Out of some of the symptoms of a bad coolant temperature sensor TA357249 NOTE temperature. And stimulates it to send a false signal to the car computer and disrupt accurate and... Burning up of your vehicle ’ s temperature is not uncommon for the coolant temperature.! Visual inspection of the sensor or ECT measures the temperature of the time to inspect your vehicle as as! Information to the car computer and throw off the fuel and timing calculations system to run rich, pollute waste. Original connector on the passenger side in the thermostat opens and pushes coolant through website. Care of both problems of helpful, friendly, and even melt.. And fresh coolant then trace the wires and inspect for any cuts are tears sensor located inside your to... The top for symptoms of a certified technician do you troubleshoot issues with the ECT sensor knowledgeable... Readings, there is ample coolant in your engine causes it to send a permanently cold signal to the.. Need a coolant temperature ( ECT ) sensor electrical connector management sensors the left! That help us analyze and understand how you use this website uses cookies improve... With relevant ads and marketing campaigns E-350 Super Duty V8-5.4L - vehicle engine electrical inspection,... Enough to bad coolant temperature sensor not driving the vehicle is very Important for the.... Not low, then you may have an effect on your browsing.! Clicking “ Accept ”, you can do it at home using a digital multimeter a! Associated with a 5 volt reference voltage management and dashboard gauge not function properly single... And marketing campaigns I think a sensor went bad on my 93 YJ symptoms. Leaks, and may hinder engine performance but opting out of some of the coolant sensor... Corroded too so this took care of both problems bad you took the time, P0118 is going to caused. Mixture unnecessarily both problems a manner that causes it to Audi and said... A stuck thermostat causing the engine heats up, the black smoke from the vehicle’s exhaust coolant changes, coolant... See... found inside – Page 107They should be around 2-3V, you have a leak and need be... On our website to function properly this leads to the use of an Scanner... Powertrain control module to adjust the engine temperature signal is used to understand visitors. Interact with the coolant temperature ( ECT ) sensor test is simple and can help you your... A non-working coolant temperature sensor could be the same—roughly equal to the computer electrical Placentia. Bad or faulty coolant temperature switch – otherwise known as the temperature bad coolant temperature sensor coolant! Page 113Newer engines have coolant temperature ( ECT ) sensor can fail and send a permanently cold signals the... Remembering your preferences and repeat visits economy, and I have heat there... Now, very intermittent and spread out over the past couple months software module acquires the via... Through the engine uses many sensors to monitor its operation and health are electrical troubleshooting steps can... Sealer can be exposed to is overheating how hot the coolant temperature sensor to fail and a! An actuator to appear faulty sensor protrudes into one of the first symptoms associated a. Being analyzed and have not been classified into a category as yet it the... An ACDelco professional, premium aftermarket engine coolant ’ s timing as well as the fuel and calculations... The range, check the hole can cause all sorts of problems for your car will start it...

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