How Does A Coolant Temperature Sensor Work

Our professional engineering and sales staff have more than 50 years of experience to ensure you get the best solution for your application. 0L V8 Ford Mustangs. I have a 2002 vw passat v6 and I changed the coolant temp sensor I drove it to see if it worked and the car started overheating and smoking really bad when I pulled the old sensor it had no o ring on it any suggestions on what I did wrong Ps when I put the new temp sensor in it wouldn't clip in or anything I was able to just pull it back out. Am I correct in this thinking?. 0L Powerstroke diesel engine. Once the coolant within the engine rises to running temp/thermostat temp, the thermostat will open and allow the hot coolant out of the engine and start the circulation loop to and from the front radiator. The right interval will depend on a range of factors - from the age and condition of your car, to the type of driving you do most often and the variety of coolant/antifreeze in the reservoir. The vehicle interior temperature should be between 4°-32°C (40-90°F) when carrying out the self-test. Since the coolant is being sucked from the same cavity in the block into the pump past the second sensor, my guess is that there will be little if any temp difference. I would recommend letting the car cool for a little bit before doing as it is a tight fit in there and you don't have to work around a hot tank and hoses. If temperature gauge indicates hot, replace coolant. Crankshaft Position Sensor Provides computer with crankshaft position and RPM information for calculating injector repetition, timing advance, and distributorless ignition synchronization. This video shows what I mean on the display. This can cause the computer to incorrectly compensate for a lean signal, which can result in overheating, and even misfires or engine ping. Warning: Refer to applicable model year wiring diagram for circuit information. I bought speedhut gauges that come with a temp sensor fitting into an 1/2" NPT adapter (two pieces on the left). This is an analog device evaluates the coolant's temperature and sends this information to the engine computer. ECT (Engine Coolant Temperature) Sensor. The coolant temperature gauge is driven from the ECM and will read the temperature that the ECM thinks it sees. High resistance or a partially broken wire causing the temp sensor signal to the PCM to be skewed / inaccurate. Once the engine is up to temperature the thermostat opens and the coolant flows around the whole system. So If it was the green Sensor what would it make the car do? And what if it was the other one that was bad what would it do? Please give me the diffents. The engine coolant sensor or a separate engine temperature switch is used to monitor engine temperature. This happens because the PCM has increased fuel delivery to meet the fuel map for the indicated (not the actual) engine operating temperature. Engine Coolant Temperature Sensors. The tip of the CTS is probably located right next to the engine coolant. Allow the engine to idle for around five minutes. i have a 92 gmc 1500 with 4. engine coolant temperature. Add to Wishlist. The coolant temperature sensor is fastened to the intake manifold of an engine coolant and is often referred to as a negative temperature coefficient type of sensor. 32, an ECT sensor indicating a momentary dip in coolant temperature could result in a no-code, cold-engine driveability complaint. Back to your temp sensor. The coolant temperature sensor must be a Negative Temperature Coefficient (NTC) thermistor. TEST 1: Checking the Temperature with the Key On Engine Off. 6: The new 3. The first is it looking down near the steering shaft. it only has one wire. 3L coolant temperature gauge & fan only work. Coolant level is still fine, but my normal "high" coolant temperature is now 195 to 200 degrees. 96 VW Golf GL 2. The are Thermo-couples, Resistance Temperature Detectors (RTDs), and Hall Effect sensors. You can troubleshoot coolant temperature sensor problems by watching the temperature gauge on your vehicle. Replacing the thermostat and the engine coolant temperature sensor (ECTS) are some of the easiest repairs that you can do on the SL2. if electric fans , check coolant temp sensor , 2 fuses , fan relay and fans When an engine is shut down , the coolant temp will rise as the heat is still in the cylinder walls and heads and the water is not being circulated when it goes to instat boil , the engine temp is close to boil anyway. The readings from the (ECT) sensor are sent back to the engine control unit (ECU). If I really push it, I can get it as high as 207. A temperature sensor basically senses temperature, but it does it in a number of ways. How often you use your car’s air conditioner: Although the air conditioner does a fine job of keeping the interior of the car cool, it raises the temperature of your engine. The computer needs this to control when the engine uses the oxygen sensor to adjust the fuel mixture, and when to turn on the radiator fan for 1985 and later models. Since the coolant is being sucked from the same cavity in the block into the pump past the second sensor, my guess is that there will be little if any temp difference. The vehicle interior temperature should be between 4°-32°C (40-90°F) when carrying out the self-test. We rely on temperature gauges to tell us the conditions inside the engine's cooling system, naturally assuming that the readings are accurate. WARNING: Be very careful when installing the new temp sensor! If the wrench slips it can break the sensor. As the coil or spiral unwinds it pulls the linkage on the needle, which in turn shows a temperature reading on the gauge face. In fact, worn coolant becomes a pretty darn good electrical conductor, accelerating internal electrolysis. / can the coolant temperature sensor cause my AC and check gauges. It is the coolant level sensor, looks like I have to keep the over flow bottle full almost to the top to keep the sensor from going off. A contact temperature sensor will read the temperature of an object that it is attached to physically. Coolant Temperature Sensor/Switch The sensor that operates the temperature gauge/overheat red light is located on the top of the head, directly behind the thermostat housing on the 4 cyl. Wire length = 30" (76cm). I replaced the sensor and it didn't change anything. AutoMeter mechanical analog water temp gauge and huge temp probe and cable (the cable and probe do not detach from the gauge for installation!) If you don't want to drill into your thermostat housing to install the temperature probe, you can install the probe into the throttle body coolant lines by splicing in a 1/8th inch NPT "T". However, most people don’t realize that the temperature sensor may be malfunctioning. C-Class (W204) - Coolant temperature sensor location on '08 C300 w204 - Hello, I have a 2008 C300 that needs to have the coolant temperature sensor replaced. Other cars have an electric fan, also switched on and off by a temperature sensor. The engine coolant sensor or a separate engine temperature switch is used to monitor engine temperature. If the temperature rises up the sensor is reduces the voltage of the sensor. It may even stall. When the coolant reaches a given temperature, the electric cooling fan switches on to draw more air through the radiator. Often this code causes the Check Engine light to come on and off in cold temperatures. I had to tape a mirror to the firewall to see how the sensor was secured, The new sensor came with a spring clip. I have the replacement sensor but I am not sure where is the coolant temperature sensor is located. hot wire coolant fan using jumper wires to battery if fan dont work replace the fan motor. Behind the alternator bracket sits an old sensor, which does not work as i tried it, but before draining coolant and all that i thought better ask first if it is worth the effort and get a good reading. Steps to Test a Coolant Temperature Sensor. This is what I have done. This replaces the " choke " of yesteryear. Click the button below to add the Toyota OEM Engine Coolant Temperature Sensor 83420-AA010 to your wish list. Do Engine Coolant TTemp Sensor and Dash Temp Gauge work independently? Hello, I bought a 2004 BMW 325ci, it overheats, it had a dtc saying something about coolant temperature circuit or sensor, I cleared, and don't know the exact DTC number. The computer uses this and other inputs to calculate the correct amount of fuel delivered. Am I correct in this thinking?. The Engine Coolant Temperature sensor (ECT) is located in a coolant passage in the engine usually near the thermostat. Application. The ECM- driven coolant temperature gauge will reflect what the ECM thinks the coolant temperature is, about 20⁰F less than it really is. A countercurrent heat exchange with forced cooling air does the job. Since the coolant is being sucked from the same cavity in the block into the pump past the second sensor, my guess is that there will be little if any temp difference. engine coolant temperature. The effect on the engine due to the concentrated anti-freeze depends on two things. Does anyone know where the temp sensor is located on the V-6?Put a scanner on and reads 200 warmed up. I really enjoyed doing this video. If the temperatures are not within the specified ranges, false in-car temperature sensor DTCs will be displayed. When the ECT sensor quits working, the transmission starts shifting hard (I just checked the transmission fluid; Ended up adding about 2 quarts, but it is still shifting hard). When you replaced the temp sensor, did u get a coolant temperature sensor or a temperature switch? Because i have a 98 and my coolant light was coming on so i suspect that the coolant sensor was bad. I had to do some searching before I finally found it. Here's how: Set the car heater to cold. You can do it at home using a digital multimeter and a cooking thermometer. Your order may be eligible for Ship to Home, and shipping is free on all online orders of $35. Richard Lloyd 2,356,128 views. With 2 Flat Pins. The key to cooling is heat transfer. The coolant temperature sensor uses a “mushroom” shaped key way where it inserts into the sensors, while the open element intake air temperature sensor uses a “rectangular” connector key way. We would love to hear how these steps worked for you if you tried them out already. Terminal Type: Flat Pin. You may have to register before you can post: click the register link above to proceed. Once the engine reaches its operating temperature (generally about 200 degrees F, 95 degrees C), the thermostat opens. Most pro's test actual voltage coming out of the engine coolant temperature sensor. Terminal Type: Flat Pin. If the coolant drops below the designated level, the switch opens, sending a signal to the indicator light. There are two plugs on the left side of the block that might work, but by now they are probably heavily rusted and the heads will strip out. Extra cooling is not needed when a cold engine is first started, so the fan does not come on until the engine reaches normal operating temperature (195 to 215 degrees). TEST 1: Checking the Temperature with the Key On Engine Off. A coolant temperature sensor (CTS) (also known as an ECT sensor or ECTS (engine coolant temperature sensor) is used to measure the temperature of the coolant/antifreeze mix in the cooling system, giving an indication of how much heat the engine is giving off. it doesn't start out high, but i don't know the normal range for the coolant t. Various Engine Sensors Types of Engine Sensors: A thermocouple sensor is a temperature measuring device. The sensor circuit can be checked for proper voltage using a voltmeter. Ground resistance is what subsequently varies the voltage passing through the circuit. This is because, combustion and lubrication is at the most optimum at this point. There are about two commonly used coolant sensors today. Uplander - Engine Coolant Temperature Sensor Location - My engine coolant temperature gauge has started to reflect only C. When it reaches 80 degrees, it must open itself to give way to the coolant that the engine requires. The coolant temperature sensor on a Chevrolet engine is used by the vehicle's computer to determine how hot or cold the coolant flowing through the engine block is at any given time, so that the computer knows how to properly run the engine. The engine coolant sensor or a separate engine temperature switch is used to monitor engine temperature. This sensor sends coolant temperature data to the ECM, which uses the data to adjust fuel mixture, idle and other engine performance parameters. Do you think this might work for a few days assuming I keep after my coolant level? To replace the valve on the heater hose does the radiator have to be drained? Scott, in response: I would just buy another heater hose and bypass the valve. Run the car until the engine reaches normal temperature. And though high heat can be caused by numerous things, it's the job of the EOT sensor and the engine coolant temp sensor to detect these conditions and let you know about it before things get to that critical stage. this sensor is located on the thermostat housing, on the V6 it is located below the thermostat housing, just above the water pump, and screws into the intake manifold water jacket. Coolant Temp Sensor Help I planned on starting my car for the first time after the swap tomorrow, but the temp sensor with the 1/2" NPT to 3/8" NPT bushing I needed to adapt it to the hole in the Weiand X-CELerator manifold is too tall and is blocking the upper radiator hose. Usually a two wire sensor, a 5Volt reference from PCM (Powertrain Control Module) and ground signal to PCM. When the engine is cold, no coolant flows through the engine. I have found some good info relating to voltage divider circuits for coolant temperature errors,P0118 – Engine coolant temperature (ECT) sensor -high input – OBD2 Trouble Codes So I will be following some of the relevant suggestions. The coolant temperature sensor is comprised of a metal housing filled with a composite which varies the resistance through its internal circuit as the engine temperature increases or decreases. The coolant temperature sensor can also fail in a manner that causes it to send a permanently hot signal. All you need is a digital multimeter. The float may have become stuck, the magnet of the switch may have fallen off, or the wiring for the sensor may be. How to Save on Coolant Temperature Sensor Replacement If you know for sure that the sensor is the issue, then you can replace it without much trouble. thanks, I have an adjustable bench psu so can get 10V, this gauge does not work but I can pkay and see if its something simple. Check coolant level, radiator cap, temperature sensor, and thermostat. The coolant temperature sensor checks how hot the engine's coolant is running. The sending unit decreases its circuit's resistance as the temperature of the engine coolant rises. Installs in minutes. - radiator coolant was flushed and refilled - checked relay fuses to radiator and A/C fan - unplugged the temperature gauge connector (next to coolant temperature sensor) in engine bay. Like a human body, the absence of one part or system can render your vehicle futile. The float may have become stuck, the magnet of the switch may have fallen off, or the wiring for the sensor may be. See Spanish-English translations with audio pronunciations, examples, and word-by-word explanations. How the Temperature Sensor Works. The OBDII trouble code P0128 - Coolant Temperature Below Thermostat Regulating Temperature means that the engine does not reach expected temperature after running for sufficient time, or in other words, takes too long to warm up. Attach one lead of your tester to the black wire, and the other lead to ground. They are typically 2 pin devices. howstuffinmycarworks. If the engine is cold, the coolant sensor will tell the CPU to perform a closed loop operation and raise the idle speed to quickly heat up the engine. How does fuel sensor work in VW-s? If this is your first visit, be sure to check out the FAQ by clicking the link above. But this time, I stumbled upon a few resources that explained how part of the ignition process controlled by the computer relies on the Engine Coolant Temperature sensor. this sensor is located on the thermostat housing, on the V6 it is located below the thermostat housing, just above the water pump, and screws into the intake manifold water jacket. When you first turn on the vehicle if should be cold and as the vehicle warms up it should slowly rise to the midway point between cold and hot. coolant level sensor, how does it work? I recently replaced a ruptured coolant expansion tank, and a new tank cap. engine coolant temperature sensor is faulty. Cannot find the coolant temp sensor to save my life. The engine coolant temperature sensor is located on the cylinder head, usually found beside or near the engine thermostat in the water jacket. This is the coolant temp sensor for most later TDIs. Normal Reading. Coolant temperature sensor is a multi-purpose sensor as it's data is required in optimizing the performance of modern ECU equipped engines. Wire length = 30" (76cm). This sensor is usually on top of the engine somewhere, plugged into a coolant passage, not in the radiator. and i asked for a coolant temp sensor and then replaced the one on the left and my guage stop working. 7 engine coolant temperature sensor × Help us help you. Connector Shape: Rectangular. It still shows that the car is over heating and it beeps at you like your going to blow the gasket but it is not over heating. 0L V8 Ford Mustangs. As ­illustrated by the 1996 OBDII vehicle example in Diagram 3 on pg. It is a two-wire thermistor immersed in coolant and measures its temperature. How do they work? Analog sensor readings are sent back to the ECM to ensure a proper air/fuel ratio by adjusting the fuel injection and ignition timing. It is situated under the hood on the engine block. Voltage Regulator Alternator Temp Sender Repair $2. By this continuous monitoring of coolant resistance (and the voltage output), the coolant temperature sensor sends temperature information to the car's engine control unit. You can troubleshoot coolant temperature sensor problems by watching the temperature gauge on your vehicle. do i have the wrong part? or is he looking at the wrong sensor? It seems kinda strange that a coolant temperature sensor would be directly above and exhasy port on the head. Check your car before ordering, early cars (98-00) use the blue sensor instead. Once the sensor detects low coolant, the driver is alerted by a light illuminated on the dashboard. Learn what does P0125 Toyota Insufficient Coolant Temperature for Closed Loop Fuel Control means, location and how to repair? The Engine Coolant Temperature (ECT) sensor is used to monitor the temperature of the engine coolant. How hot does your vehicle's engine get during an average drive? You may not know—but hopefully your vehicle coolant temperature sensor does. The engine coolant temperature (ECT) sensor test is simple and can help you fix your car faster. Unlike Your Steering Wheel in Seconds with These Two Tricks; How to Paint Your Car Wheels Like a Pro; Step 1: Locating the Coolant Temperature Sensor. Because of lack of clarity on which one you are enquiring on, ill explain how both work. So continue reading to keep the ECT sensor in your Civic working as it should. It’s a simple enough procedure, but the real problem with trying to save money by doing the work on your own is that there is a chance that you will miss some other important factors that are. Because coolant absorbs the heat generated by the engine and transports it to the radiator to cool down, it stands to reason that low or weak coolant levels mean its job performance is compromised and your car can. An engine coolant temperature sensor measures coolant temperature. GM 2 Wire Coolant Temperature Sensor Connector $11. Coolant temperature sensor - Allows the ECU to determine when the engine has reached its proper operating temperature Voltage sensor - Monitors the system voltage in the car so the ECU can raise the idle speed if voltage is dropping (which would indicate a high electrical load) Manifold absolute pressure sensor - Monitors the pressure of the. Translate Engine coolant temperature sensor. It is recommend that you use a 1/4-inch ratchet with a long socket on it so you don't torque it too much. You can do it at home using a digital multimeter and a cooking thermometer. The Coolant Temperature Sensor, also referred to as Engine Coolant Temperature Sensor, is a very important monitoring device in order for your vehicle's engine to operate efficiently. The coolant temperature sensor temperature reading should closely match the air charge/manifold temperature reading on a scan tool if the engine has not been run for over an hour. follow the upper rad hose to the intake the sensor will be in the first passage of the intake probably on the passenger side of the engine. So, it could either be this or, possibly a bad sending unit itself. The sensor modifies a voltage signal from the Engine Control Module. You can do that, but it's not a very accurate test. If your gauge does not work correctly during normal running but responds as above, then your gauge is fine but your coolant temperature sensor is bad. Thermistors are another type of temperature sensor, and they're mostly used in human thermometers and appliances. Also is there one or two? reason why I ask about one or two is because many vehicles use 2 sensors, 1 sensor, and one sender for the gauge. Whether your BMW's coolant level is too low or the operating temperature is too high, these sensors send urgent information so you can react as necessary. I need some help troubleshooting the problem. When you first turn on the vehicle if should be cold and as the vehicle warms up it should slowly rise to the midway point between cold and hot. Coolant temperature gage does not work replace temp sensor in block still does not work put a paper clip in plug and - Answered by a verified Ford Mechanic We use cookies to give you the best possible experience on our website. According to thefactory Service manual the engine coolat temperature sensor is something that, when bad, can cause a rough idle, misfire, and general porr running of the engine. Engine Coolant Temperature Sensor Replacement Cost The average cost for a Mercedes-Benz GLA250 engine coolant temperature sensor replacement is between $510 and $633. Coolant thermistor temperature sensor compatible with Koolance multi-sensor systems. A4 ALH models. Terminal Type: Flat Pin. Start by checking for the fuse, then use a test light to ensure power is reaching the wiring for the fan. I had to do some searching before I finally found it. To overcome this, some cars have a viscous coupling a fluid clutch worked by a temperature sensitive valve that uncouples the fan until the coolant temperature reaches a set point. There are 4 simple and easy steps that you need to follow. The engine coolant sensor or a separate engine temperature switch is used to monitor engine temperature. A coolant temperature sensor can age and deteriorate in time so it is important to know how to replace a faulty temperature sensor. I have read that the ECM, Coolant temp sensor are directly related to the glow plugs. This is a function of coolant capacity and heat dissipation, not just the speed of the circulating coolant. This happens because the PCM has increased fuel delivery to meet the fuel map for the indicated (not the actual) engine operating temperature. Other cars have an electric fan, also switched on and off by a temperature sensor. The first is it looking down near the steering shaft. I did an OBDI conversion which required me to either tap another hole for a 2nd coolant sensor, or splice wires from the stock one on the s52. Also it's making a Noise the same Noise as when you have a door open or the boot open. Factory replacement Mustang temperature sending units are coolant temperature sending unit is located at the front of the Mustang lower intake and indicates the engine temperature to the temperature gauge. Once the sensor detects low coolant, the driver is alerted by a light illuminated on the dashboard. It is the HHR most common failure. Am I correct in this thinking?. Terminal Type: Flat Pin. How Automotive Temperature Gauges Work. If temperature gauge does not indicate cold, go to step 3). Factory replacement Mustang temperature sending units are coolant temperature sending unit is located at the front of the Mustang lower intake and indicates the engine temperature to the temperature gauge. 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. Cluster uses the signal for gauge. The engine temperature sensor connects either to the temperature gauge or to the temperature indicator in the dashboard. if sensor good check cooling fan fuse and relay. In this procedure a 55-Ohm ResistorPac is placed in series with the coolant temperature sensor, raising the fan-on, fan-off, and derating temperatures by making the ECM “think” the coolant temperature is cooler than it really is. The engine temp sensor is different on most cars than the coolant sensor even though they both measure coolant temperature (usually). Terminal Quantity: 2. The most common symptom that indicates a bad (ECT) sensor is an engine control system that fails to go into closed loop once the engine is warm. It can help the control unit in your engine system to detect when the coolant is not functioning well and your vehicle is overheating. The ECM uses this signal for engine protection when coolant is not detected. All you need is a digital multimeter. We offer a plethora of Temperature Sensor Switch for your vehicle needs. Connector Shape: Rectangular. If the radiator fan is in working condition, move on to the next step. The signal from the sensor is shown and can be downloaded. TEST 1: Checking the Temperature with the Key On Engine Off. This model also integrates a coolant temperature sensor, which can be interpreted with a separate Koolance product such as CTR-CD1224 or 10K-ohm compatible cooling system. The engine coolant temperature sensor reads the temperature of the coolant in one or more of these passages, and relays that information to the vehicle computer. Warning: Refer to applicable model year wiring diagram for circuit information. thanks, I have an adjustable bench psu so can get 10V, this gauge does not work but I can pkay and see if its something simple. Standard Coolant Temperature Sensor. One of the things that will help you solve a ECT temperature problem is knowing how it works. A temperature sensor measures the hotness or coolness of an object. The coolant temp sensor tells the ECU how cold it is, so the ECU can richen up your fuel mixture accordingly. Obviously if the coolant temp sensor says it's 190 degrees out but the air is only 30 degrees something is up. So, anyone want to take a shot? I'm leaning toward the coolant temp sensor but not sure if it does anything other than read temp and whether it's output would effect the other symptoms. / can the coolant temperature sensor cause my AC and check gauges. The GT-R gauges come with a separate Speed Hut coolant temperature sensor for the instrumentation, along with sensors for oil temp and oil pressure. In short, I use a Range Rover coolant expansion tank cap as sensor for the coolant level. The coolant temperature sensor has a built-in NTC resistor. Remove the sensor Connect it to a 12V buld and 12V dc power supply. And one of these connectors is the connector for the coolant temperature sensor. The most common symptom that indicates a bad (ECT) sensor is an engine control system that fails to go into closed loop once the engine is warm. temperature gauge not working. The coolant temperature sensor is fastened to the intake manifold of an engine coolant and is often referred to as a negative temperature coefficient type of sensor. Most pro's test actual voltage coming out of the engine coolant temperature sensor. Once the sensor detects low coolant, the driver is alerted by a light illuminated on the dashboard. The sensor itself is a thermocouple, in which electrical resistance changes relative to temperature. How does coolant level/temp sensor work? The coolant level probe works by "sensing" the slight resistance (or conductivity is another way of looking at it) of the coolant. engine coolant temperature sensor is faulty. my fan doesn't come on even when my coolant temperature reaches 220 degrees. Well after a good lesson on this install it turns out still no fan or a/c. The coolant level sensor is located on the radiator or at the bottom of the expansion tank, depending on the make and model of. You seemed to confirm that noting that the temp gauge reading was the same with the swapped location. This provides a reference signal to the PCM, which indicates engine coolant temperature. It may even stall. It changes resistance with the temperature. I have a coolant temperature sensor. So, it could either be this or, possibly a bad sending unit itself. I really enjoyed doing this video. If temperature gauge does not indicate cold, go to step 3). The coolant temperature sensor is what tells the car's computer what the engine's running temperature is. Engine Coolant Temperature Sensors. Detaching battery for a few mins fixes both but only for short period of time then they both fail again. 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. Most pro’s test actual voltage coming out of the engine coolant temperature sensor. An ECT sensor, or Engine Coolant Temperature Sensor is a sensor that is screwed into the engine's block or cylinder head and is used to determine the temperature of the engine coolant. Back to your temp sensor. The coolant sensor measures both the temperature of the engine coolant (“antifreeze”), and the rate of the temperature change. How do you replace the coolant temp sensor on a 2002 Explorer XLT V6, SOHC 1 Answer. You need to have a scanner on it to look at what the PCM is showing as the coolant temp. I forgot to write down the exact model number but its an automotive AC Delco coolant temperature sensor like this one. But this time, I stumbled upon a few resources that explained how part of the ignition process controlled by the computer relies on the Engine Coolant Temperature sensor. What do they do? Determine the exact temperature of the engine coolant. This time they said the coolant sensor seemed to be working, however they told me that the wiring may be being shocked or vibrated causing a temporary false reading triggering the light. Also is there one or two? reason why I ask about one or two is because many vehicles use 2 sensors, 1 sensor, and one sender for the gauge. Since this is a two wire sensor, it has a sensor negative and sensor positive, both go to the PCM. The coolant level sensor uses a moveable float device and a reed switch that senses when the radiator has low coolant. I know if I do this that the idiot light will not work. if electric fans , check coolant temp sensor , 2 fuses , fan relay and fans When an engine is shut down , the coolant temp will rise as the heat is still in the cylinder walls and heads and the water is not being circulated when it goes to instat boil , the engine temp is close to boil anyway. Checked oil. The use of "aftermarket" over-the-counter sealing and cooling supplements may affect the operation of the low coolant level sensor. An engine uses different types of sensors. 5) Repeat the test at two other temperature points, heating or cooling the water as necessary. 6 doesn't have the coolant tempo sensor near the coolant inlet on the front of the block. To help determining whether a coolant temperature sensor is functioning correctly, different possible deviations from the example signal are mentioned along with probable causes. Try RockAuto for the sensor. How does the oxygen sensor in a car work? NEXT PAGE Image Gallery: Engines The amount of oxygen the engine can pull in depends on factors such as the altitude and the temperature of the air and engine. This sends information from the control unit to the dashboard of the vehicle. This time they said the coolant sensor seemed to be working, however they told me that the wiring may be being shocked or vibrated causing a temporary false reading triggering the light. The self-test can be initiated at any time. The wiring schematic for DB37 shows only one input for all of the sensors (except for the two for the TPS). The engine temperature sensor connects either to the temperature gauge or to the temperature indicator in the dashboard. Coolant Temperature Sensor monitors the temperature of the water in the engine. The prefix piezo- is Greek for 'press' or 'squeeze'. it both okay. The sensor unit, however, may be in one of several locations - the thermostat housing, the cylinder head or the upper radiator hose. One of the things that will help you solve a ECT temperature problem is knowing how it works. The coolant temp sensor tells the ECU how cold it is, so the ECU can richen up your fuel mixture accordingly. The Engine Coolant Temperature Sensor (“ECT” for short) is an analog sensor which, as it’s name says, measures the temperature of the coolant and feeds this data to the on-board computer. If the resistance is low, the ECU sensor voltage is pulled lower. What is Engine Coolant / Antifreeze This guide explains 'What is engine coolant / antifreeze, what it does, why you should use it, what type of antifreeze / coolant to use and where to put it'. We actually do not know what the -08 reading is. if sensor good check cooling fan fuse and relay. If the sensor does not function properly ( indicating a warm engine ) the fuel mixture would be lean. It monitors and because of the way it is wired into the system, sends electrical signals back to the engine control module that uses the data to adjust the fuel enrichment, ignition timing and other critical engine functions. The OBDII trouble code P0128 - Coolant Temperature Below Thermostat Regulating Temperature means that the engine does not reach expected temperature after running for sufficient time, or in other words, takes too long to warm up. An ECT sensor, or Engine Coolant Temperature Sensor is a sensor that is screwed into the engine's block or cylinder head and is used to determine the temperature of the engine coolant. When an engine is cold, the computer sends signals to the fuel injectors to release more fuel. This video shows what I mean on the display. You can substitute some hard work and time to save you money, resulting in fabulous ValueGrade Coolant Temperature Sensor (WT5058Z). Depending on the sensor information, the control unit adapts the injection time and firing angle to the operating conditions. I had to do some searching before I finally found it. QUOTE=toxicwaste29;477227]Here is a short brief write up for replacing the coolant temp sensor on a 3. Technical information on the Coolant Temperature Sensor (CTS), what these controllers are and how they work. The sensor works by measuring the temperature that’s being given off by the thermostat and/or the coolant itself. How to Save on Coolant Temperature Sensor Replacement If you know for sure that the sensor is the issue, then you can replace it without much trouble. Engine Coolant Temperature Sensor Replacement Cost The average cost for a Porsche Boxster engine coolant temperature sensor replacement is between $142 and $221. Coolant temperature gage does not work replace temp sensor in block still does not work put a paper clip in plug and - Answered by a verified Ford Mechanic We use cookies to give you the best possible experience on our website. As the coil or spiral unwinds it pulls the linkage on the needle, which in turn shows a temperature reading on the gauge face.