Re: Mk2 punto coolant temperature sensor Originally Posted by TONY55S removed sensor,ignition on,but the fan didnt run,i have a feeling that the screw in sensor attached to gearbox is not the one i am looking for,how would sensor on gearbox monitor coolant temperatur?. Before you decide that the sensor needs to be replaced, first see if the engine coolant loop has air in it. Circuit Description. Place the ECT sensor No. 5 PREVOST INSTALLED SENSORS 2. The coolant temperature sensor is near the thermostat housing and the cylinder head temp sensor is at the rear of the left cylinder head. The coolant temperature sensor is located on the engine block under the hood. Well it turns out the coolant sensor is in the thermostat housing on the top of the engine in my car. Find Coolant Temperature Sensors with 3/8 in. (c) Disconnect the engine coolant temperature sensor connector. What does that mean? This diagnostic trouble code (DTC) is a generic powertrain code, which means that is applies to all 1996-newer vehicles (Ford, Hyundai, Kia, Mazda, Mercedes-Benz, etc. To replace a faulty coolant temperature sensor, open the car's hood, remove the fan, and disconnect the lead wire from the terminal. It is designed to help the engine run at the maximum efficiency, scoring the right mix of horsepower, emissions, and gas mileage. Note that there has been coolant sensor confusion on the internet and some dealers in that many confuse the engine oil temperature sensor with the coolant sensor. How to locate the engine coolant temperature sensor and disconnect the electrical connection - Answered by a verified Mechanic for Honda We use cookies to give you the best possible experience on our website. Hi, Can anyone tell me the exact location of the Engine coolant temperature sensor? RAVE tells me, The ECT sensor is located in the engine block at the front of the engine. We could tell you how to test it, but they're so cheap (about $15) and easy to replace, that it makes more sense to just replace an engine coolant temperature sensor. The sensor uses a thermistor which is sensitive to the change in temperature. What CEL code are you getting? Or are you just getting the a/c off due to high temp message?. Using 19mm deep socket, remove the sensor after removing the connector. 0t FSI engine can cause check engine lights and potential coolant gauge issues. It sends a signal to the electronic control unit that provides information on the. 60-P-3000QB Remove/install temperature sensor 19. Very easy to do project if you have to replace yourself. 01100 Motor Position Sensor. If you disconnect the Temperature Sensor (which as the name implies only senses temperature) your engine will still overheat. 7 COMMON POWERTRAIN CONTROLLER (CPC) • Engine Coolant Level Sensor (ECL Sensor): Senses coolant level for engine The CPC is the interface between the MCM and protection (mounted on coolant surge tank). The main goal is to get the engine up to temperature and make sure the coolant system can get up to pressure without blowing the sensor out and spilling coolant all over the road. checked coolant level- it was fine. It is a four wire sensor, with two separate circuits, one for the instrument cluster and one for the DME. Most coolant temperature sensors operate using electrical resistance to measure the temperature of the coolant. I plugged the hole in the radiator with a new sensor and retaining clip and that solved my problem. 3 L) Close bleeder screws when bubbles disappear and only coolant is visible. Not sure how old the BMW is but newer cars mount the coolant temperature sensor on the head, the ECU monitors the temperature and turns on the fan when needed. Internal combustion engine cooling uses either air or liquid to remove the waste heat from an internal combustion engine. If you are looking from the passenger fender, you will see it under the throttle body. Component Name. A quick trip to a qualified mechanic with a diagnostic computer will tell you if the check engine. The Engine Coolant Temperature (ECT) sensor contains a semiconductor device which changes the resistance based on the temperature (a thermistor). MPFI 86-88 4 Cyl. You will search for the sensor within the engine block itself, using a drop light if you need help to see it better. How to remove a broken off coolant temp sensor without fancy tools, and nothing to grab on to on sensor. Introduce propane into the intake to enrich the mixture until the engine rpm drops by 200 rpm. Inspect and clean radiator. As the engine warms up the fuel mixture is leaned out to its normal level and then continuously adjusted to maintain emissions. You have no items to. Page 2 of 9. Remove engine cover. 06 ENGINE 272 in MODEL 203, 209 Coolant temperature sensor ENGINE 273 in MODEL 209 Coolant temperature sensor P15. One is a Coolant Temperature Sensor and the other is a Coolant Temperature Switch The Sensor is for the Engine computers to calculate the air/fuel ratio and the Switch gives you the temp reading on the dash. The coolant temperature sensor is located on the front of the engine block. Test the ECT sensor while running the engine to vary the sensor temperature while monitoring the sensor resistance with DMM ohmmeter function: Animation: Test Engine Coolant Temperature ECT Sensor (View). There is one at the front of the engine in the thermostat housing, this one has two wires. 21** O2S Stays at center O2S shorted to voltage : O2 sensor does not detect rich or lean condition, or O2 sensor input voltage too high. harness Supply and Return lines are shared by the engine coolant temperature sensor, the engine oil pressure switch, and the barometric pressure sensor. Disconnect the O 2 sensor and connect a voltmeter to the sensor plug. Just like with any car, there are things that need to be checked or replaced in order for them to work properly. The coolant temperature sensor, also known as the coolant temperature switch, is the engine management system that monitors the temperature of the coolant and relays this information to the ECM. 60-P-3000QB Remove/install temperature sensor 19. You will search for the sensor within the engine block itself, using a drop light if you need help to see it better. Same exact procedure for any FS engine from 1993-2002 Mazda MX-6, Ford Probe, or Ford Telstar Video cannot be played. That's why pumping the gas pedal keeps your engine running. if its cold out the sensor will adjust for more fuel to ease the start of the engine. Engine Coolant Temperature (ECT) Sensor Removal/Installation WARNING: When the engine is hot, it can badly burn. The check engine light as turned off so looks like replacement of the Coolant Temp Sensor did the trick. Just disconnect the wire, turn out the sensor and replace it with a new one. Once the coolant stops pouring out, replace the plug. Richpin shows the proper way to replace an engine coolant temperature sensor on a Saturn S series. Checking for the updated thermostat: The 11 53 7 534 521 thermostat has a replaceable engine temperature sensor (1). When the sensor is functioning properly, it will tell your on board computer if the temperature is too high, alerting the driver that a problem exists. The only way a system would know this, is if you have fuel injection with a manifold absolute pressure (MAP) setup instead of MAF because MAP setups have an intake air temp sensor. Click "Download" to get the full free document, or view any other 2 PDF totally free. Preliminary Procedures. If you can't get a torque wrench in there (likely), just guestimate it. The sensor modifies a voltage signal from the Engine Control Module. I can not find the coolant temp sensor #2 in the front of the engine according to that diagram. How NOT to remove a coolant temp sensor plug This afternoon I was trying to diagnose a glow plug problem (code P0673) following the instructions in the excellent Glow plugs 101 thread. If it switches from -30c (or anything likely incorrect) to the actual coolant or air (if engine cold) temp, you've found the problem. Engine Coolant Temperature Input Voltage Problem. BMW E36 Thermostat Removal And Coolant Flush. Use zip-ties to neaten the wires. Does that mean to replace the coolant temperature sensor with a new one or is something else to resolve this issue? What is. 2015 GMC Acadia How to Remove and Replace Engine Coolant Temperature Sensor. I am not asking about the coolant temperature sending unit that drives the temp guage in the instrument cluster. NOTE: Use care when handling the coolant sensor. 2 connector. It wasn't raining or wet out, sensor wire looks good, instrument panel said engine hot, killed AC and defroster. Show Full Signature. Well it turns out the coolant sensor is in the thermostat housing on the top of the engine in my car. It is designed to help the engine run at the maximum efficiency, scoring the right mix of horsepower, emissions, and gas mileage. Check coolant level, radiator cap, temperature sensor, and thermostat. 5 PREVOST INSTALLED SENSORS 2. This is an issue, especially when you're trying to make sure your car doesn't get overheated. Does that mean to replace the coolant temperature sensor with a new one or is something else to resolve this issue? What is. Shop here and get the best deal on your Coolant Temperature Sensor purchase. 1 quarts (14. It can help the control unit in your engine system to detect when the coolant is not functioning well and your vehicle is overheating. Remove the fresh air intake tube and the intake tube from the air box to the turbo to gain access to the coolant hose. Use the appropriate wrench on the hex portion of the sensor and unscrew it from the cylinder head. 04: Engine System: Engine Coolant Temperature Input Voltage Problem. 06 ENGINE 272 in MODEL 203, 209 Coolant temperature sensor ENGINE 273 in MODEL 209 Coolant temperature sensor P15. The coolant temperature sensor plays an important role in monitoring the performance of the coolant and takes measurements of the temperature. The ECT is a thermistor, (resistance is inversely proportional to temperature) the resistance of a thermistor decreases as the temperature increases. The only way a system would know this, is if you have fuel injection with a manifold absolute pressure (MAP) setup instead of MAF because MAP setups have an intake air temp sensor. Every time the engine would kill, the light would go out at that exact moment. But since your having symptoms of a/c off due to high temp I'd like to direct you down a different path. com | Vehicle Selection - Year Autozone has free repair guides here. Check coolant level. Engine Coolant Temperature High: Engine Coolant Temperature Extremely High. Your car relies on the coolant sensor to tell it if the coolant is getting too hot, and it relays that information to you on the temperature gauge inside your car. It tells how hot or cold the engine coolant. Drain the cooling system. The system is pressurised at operating temperature to a maximum of 2 Bar, regulated by a pressure-relief valve in the filler cap. Remove the coolant hose (1). In many vehicles, a faulty coolant temperature system will trigger a check engine light or service engine light on your car's dashboard. harness Supply and Return lines are shared by the engine coolant temperature sensor, the barometric pressure sensor, and the engine oil pressure switch. 8 petrol temperature sensor location, vectra 1. Show Full Signature. 2 in water with a thermometer, and heat the water gradually. Remove the fresh air intake tube and the intake tube from the air box to the turbo to gain access to the coolant hose. However, I would try and replace it myself but I do not know where this part is situated in the engine compartment and how to replace it. If you removed the block drain, install a new compression washer on the bolt, reinstall the bolt in the block, and torque to 25 Nm or 18 ft-lbs. Engine Coolant Temperature Sensor Fastener. Bypass it with this OEM replacement MINI Cooper Coolant Temperature sensor with harness. Does that mean the side nearest the radiator or the offside engine compartment? I have looked all over but cannot see it, if. How to remove a broken off coolant temp sensor without fancy tools, and nothing to grab on to on sensor. Disconnect the ECT sensor No. checked coolant level- it was fine. With coolant at operating temp, that sensor should have around 22 ohms resistance between the single connector on top and the ground) ("nut" part). If your coolant temperature sensor isn't working efficiently, your Check Engine Light usually warns you of the hazardous heat that's affecting your vehicle. The main goal is to get the engine up to temperature and make sure the coolant system can get up to pressure without blowing the sensor out and spilling coolant all over the road. I am thinking about changing my coolant temperature sensor which is located at the back of the block. Disconnect the electrical connector. 33- Oxygen sensor, - check harness, connectors and sensor. It is screwed into the block and has a wire lead running to the engine wiring harness. Component Name. 6: The new 3. Testing your sensor. reason im asking is beacause my gauge stop working. REMOVE V-BANK COVER. The Coolant Temperature sensor is critical to many PCM functions such as fuel injection, ignition timing, variable valve timing, and transmission shifting. other is for temp gauge and rad fan and poss to tell ecu that engine is up to temp in combination with the low temp sensor telling the ecu that the engine is no longer cold. The ECM provides a 5 volt signal to the ECT sensor through a dropping resistor. I am asking about the sensor that informs the engine computer about the coolant temp. Pop off the little sensor connector and fit on your deep 3/4 in. Brand New Tridon TCS171. Engine Coolant Temperature. Order Coolant Temperature Sensor/Sender/Switch for your vehicle and pick it up in store—make your purchase, find a store near you, and get directions. I see # 2 Aux fan sensor, and three #3 Coolant temp. To Install: Apply thread sealer P/N 12346004 or equivalent to the engine coolant temperature (ECT) sensor threads. checked coolant level- it was fine. I had a '97 Camry 4 cyl and the coolant sensor on it threw a check engine light when it failed. If it switches from -30c (or anything likely incorrect) to the actual coolant or air (if engine cold) temp, you've found the problem. 2015 Buick Enclave engine coolant temperature sensor - Duration: 3:41. With the Ignition OFF, disconnect the harness connector at Engine Coolant Temperature Sensor. For Buick Rendezvous 2002-2003. Refer to Battery Negative Cable Disconnection and Connection. Sensor resistance is high when coolant temperature is low and resistance drops when coolant temperature increases. That's why pumping the gas pedal keeps your engine running. Using an ohmmeter, measure the resistance between the terminals. Coolant Temp ECU SensorCoolant Temp ECU Sensor ZPN-35355 Coolant Temperature Sender Coolant ECU Sensor Engine Engine Coolant Temperature Sensor 9312550194971 The coolant temperature sensor is designed to respond to changes in engine coolant temperature. Ok Im two steps from using dynamite to fix my car!!!! My car has had almost a complete overhaul on everything. Turn off the engine and wait until it is cool before removing the ECT sensor. They said it is either the Coolant temperuture sensor or the wiring that have a problem. When you remove the fuel rail bolt there are two washers. Try RockAuto for the sensor. use deep socket and 3/8 inch ratchet wrench. "Engine Coolant Temperature Sensor" which feeds the ECU. The coolant temperature sensor, also known as the coolant temperature switch, is the engine management system that monitors the temperature of the coolant and relays this information to the ECM. The Engine Coolant Temperature sensor is used to detect the engine coolant temperature. Replacing the engine coolant temperature sensor ensures you're aware of the correct temperature of your engine. 7L Diesel LPL. Next, measure the resistance between the two sensor terminals using a digital multimeter set to ohms. The coolant temperature sensor is considered as the "brain" of the engine cooling system. Unplug the electrical connector from the coolant temperature sensor by pressing the lock tab and pulling the plastic connector from the sensor's fitting. You can read out what this is telling the ECU with an OBD-II reader. Engine Coolant Temperature Sensor Replacement; Callout. 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. Fill the engine with coolant, and check for leaks and proper operation. This will vary on some cars where the pulleys are located on the side of the vehicle. I can not find the coolant temp sensor #2 in the front of the engine according to that diagram. So I started the car and fiddled with the sensor, and every time I push in on it, the radiator fans kick on. It is not so on mine. Honda Civic: Why is My Engine Coolant Temperature (ECT) Sensor Bad? This article will go over the signs and symptoms that will help you decide whether or not your ECT sensor needs to be replaced. Select your vehicle and go to "Engine Performance & Emission Controls" for many sensor locations. As near as I can tell it is located underneath the intake manifold on the driver's side cylinder head. Disconnect this harness by pushing in the tab and pulling it free. Once you locate the sensor, disconnect the wire lead going to the sensor with an open end box end wrench. I even put a NEW coolant temp sensor in, and the car did the same thing. 3 TBI, there are two coolant "sensors". This has Light Green with Red, and Black wires. When you see straight coolant coming out, the system is bled. There are 2 coolant sensors on a BKD engine, 1 is located down below the tandem pump thats the silver unit just to the left of the airbox/maf black tube, just below pump facing rear of engine, 2nd is in middle of front of engine behind the imf piping, needs very small hands, torch & allot of patients. Engine Coolant Temperature Sensor location? This is embarrassing, but I cannot find the Engine Coolant Temperature Sensor (ECT) on my 2004 R50 with the 3. This video shows what I mean on the display. reason im asking is beacause my gauge stop working. Does that mean the side nearest the radiator or the offside engine compartment? I have looked all over but cannot see it, if. One is a Coolant Temperature Sensor and the other is a Coolant Temperature Switch The Sensor is for the Engine computers to calculate the air/fuel ratio and the Switch gives you the temp reading on the dash. Hi Do you know where the coolant sensor water temp is located? I'm tried to search material arround the internet, but I haven't found it. The coolant temperature sensor is located on the engine block under the hood. I had a '97 Camry 4 cyl and the coolant sensor on it threw a check engine light when it failed. The Engine Coolant Temperature (ECT) sensor is mounted in the intake manifold and sends engine temperature information to the VCM. then remove the temperature sensor. Engine Coolant Temperature Sensor Fastener. 3 quarts (14. 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. 7 COMMON POWERTRAIN CONTROLLER (CPC) • Engine Coolant Level Sensor (ECL Sensor): Senses coolant level for engine The CPC is the interface between the MCM and protection (mounted on coolant surge tank). Some books report that the sensor is on the intake manifold. A quick trip to a qualified mechanic with a diagnostic computer will tell you if the check engine. 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. I even put a NEW coolant temp sensor in, and the car did the same thing. I struggled to remove the coolant temp sensor (CTS) plug for several minutes. Coolant Temp Sensor Change Out I have a 96 Tacoma with the 2. Does that mean to replace the coolant temperature sensor with a new one or is something else to resolve this issue? What is. sensor, sends a signal to the relay to turn on the high fan. So check out. I am not asking about the coolant temperature sending unit that drives the temp guage in the instrument cluster. I guess I need to replace it anyway, but does an ECT replacement sound like it would fix my problems?. Show Full Signature. The coolant temperature sensor in your vehicle's cylinder head plays a key role in the engine's operation. Well it turns out the coolant sensor is in the thermostat housing on the top of the engine in my car. Remove the battery cover. The sensor is. Coolant Temp ECU SensorCoolant Temp ECU Sensor ZPN-35365 Coolant Temperature Sender Coolant ECU Sensor Engine Engine Coolant Temperature Sensor 9312550195237 The coolant temperature sensor is designed to respond to changes in engine coolant temperature. The coolant temperature sensor is located on the engine block under the hood. 2L engine To install: If installing the original sensor or a new sensor without sealant, apply thread sealer P/N 12346004 or equivalent. Engine Coolant Temperature Sensor Fastener. The coolant temperature sensor is near the thermostat housing and the cylinder head temp sensor is at the rear of the left cylinder head. I had already purchased a 1992 thermostat housing and expected to be using it for my converted open system's electric fan thermostat. It's been associated with a problem I had where the coolant temp went to zero and the AC would stop making cold air. Be sure to work with a cool engine. I see # 2 Aux fan sensor, and three #3 Coolant temp. Remove intake/engine cover 2. 6 temp sensor replacement Here is a short brief write up for replacing the coolant temp sensor on a 3. I cleared the code thinking that water had somehow got into the wrong place and for 2 days it was OK. It is screwed into the block and has a wire lead running to the engine wiring harness. Hey guys, just finished installing my Sniper EFI. Buy Engine Coolant Temperature Sensor Connector Free NORTON SHOPPING GUARANTEE Norton SECURED Lifetime Warranty Easy Return Amazing Low Price Fast Shipping JavaScript seems to be disabled in your browser. Part of BMW/MINI Cooper Service Bulletin addressing inaccurate engine temperature readings. Garage Register; Log In. Torque the sensor to 12 ft-lb (16 Nm). Supplement the engine coolant (Refer to “Cooling System” in EM group). 1st i replaced coolant temperature sensor near the thermostat mount then reset check engine light to turn off, next day, light came back on with the same code, i replaced the thermostat and reset the light again, the next day engine light came back on again with the same code. 10100 Throttle Position Sensor. I drive a 2008 BMW X5 3. The coolant temperature sensor, also known as the coolant temperature switch, is the engine management system that monitors the temperature of the coolant and relays this information to the ECM. NOTE: Use care when handling the coolant sensor. For small or special purpose engines, cooling using air from the atmosphere makes for a lightweight and relatively simple system. need use teflon tape on coolant sensor if factory dont apply no thread sealer on coolant temperature sensor threads. Engine Coolant Temperature Sensor-Coolant Temp Sensor 4 Seasons 36424 Parts Marvel is a family run business for 40+ years. Drain the coolant system to below the ECT sensor. Page 2 of 9. However, the sensor is still located amongst the pulley system. It tells how hot or cold the engine coolant. The Coolant Temperature sensor on the 2. 13- engine temperature circuit, open or short circuit is detected- check harness, connectors and sensor. It fired right up on a rebuilt Ford 302 engine, but I'm having some issues with the coolant temp sensor. For Buick Rendezvous 2005. With coolant at operating temp, that sensor should have around 22 ohms resistance between the single connector on top and the ground) ("nut" part). The system is pressurised at operating temperature to a maximum of 2 Bar, regulated by a pressure-relief valve in the filler cap. Order Coolant Temperature Sensor/Sender/Switch for your vehicle and pick it up in store—make your purchase, find a store near you, and get directions. drain engine coolant below the engine coolant temperature sensor in the cylinder head. The coolant temperature sensor tells the engine computer the operating temperature of the engine so it can adjust the fuel mixture. Pop off the little sensor connector and fit on your deep 3/4 in. When coolant temperatures are high the resistance is low. NOTE: Use care when handling the coolant sensor. When cold, start the engine with the sensor plug disconnected to get benefit from cold start enrichment. So, the temperature gauge bottoms out, and the DIC says "A/C off due to emgine temteratures," or some such. 01100 Motor Position Sensor. The ECT sensor, also commonly just called the coolant temperature sensor, measures how hot the engine in your car is. Preliminary Procedure. (b) Remove the ECT sensor and the gasket. If you disconnect the Temperature Sensor (which as the name implies only senses temperature) your engine will still overheat. Once the coolant stops pouring out, replace the plug. Inspect and clean radiator. Refer to Battery Negative Cable Disconnection and Connection. 7L Diesel LPL. Installing the ECT Sensor. When the sensor goes bad, you might notice a few problems in the way your engine runs. REMOVE V-BANK COVER. Even if the sensor is operated by vacuum or pressure, the output is converted into an electrical signal for processing by the ECM. You can now see the coolant temperature sensor: 3. You can read out what this is telling the ECU with an OBD-II reader. 15472 - Engine Coolant. >The 'Auto Zone' diagnostic trouble code was for the coolant temperature >sensor. Fill the engine with coolant, and check for leaks and proper operation. com FREE DELIVERY possible on eligible purchases. Even if the sensor is operated by vacuum or pressure, the output is converted into an electrical signal for processing by the ECM. This will allow any air to bleed out. Go to an online service information provider like ALLDATA or Mitchell On-Demand or equivalent and download the Temperature Versus Resistance - Engine Coolant Temperature Sensor table for ECT for the vehicle you are working on. Drain coolant below the level of the Engine Coolant Temperature (ECT) sensor. For Buick Lucerne 2006-2008. This sensor keeps track of the overall temperature of the coolant in your engine. This appears to be easy as long as the O-ring sealed and the clip is in the right place. I do know they vary by model year though. reason im asking is beacause my gauge stop working. Fuel delivery, ignition timing and engine performance are among the key elements affected by the information the coolant temperature sensor gathers. I cleared the code thinking that water had somehow got into the wrong place and for 2 days it was OK. The coolant temperature sensor test is rather simple. Drain the coolant system to below the ECT sensor. With the Ignition OFF, disconnect the harness connector at Engine Coolant Temperature Sensor. So, when I got the F150 from my parents, my dad told me that he never replaced the coolant temp sensor and that it never reads above the 2nd line on the gauge in the cluster. When you remove the fuel rail bolt there are two washers. With the engine cold, make a resistance check against the chart above. The only way a system would know this, is if you have fuel injection with a manifold absolute pressure (MAP) setup instead of MAF because MAP setups have an intake air temp sensor. Now what is # 2 supposed to do?. I guess I need to replace it anyway, but does an ECT replacement sound like it would fix my problems?. I am not asking about the coolant temperature sending unit that drives the temp guage in the instrument cluster. where is the coolant tempature sensor on these trucks? i see several sensors that could be but i want to make sure before i just go to unscrewing sensors. Using 19mm deep socket, remove the sensor after removing the connector. This video shows what I mean on the display. So, Most engine coolant temperature (ECT) sensors operate; using electrical resistance to measure the temperature of the coolant. Compare Products. That's why pumping the gas pedal keeps your engine running. Next, measure the resistance between the two sensor terminals using a digital multimeter set to ohms. You will search for the sensor within the engine block itself, using a drop light if you need help to see it better. Timm's The BMW M60 M62 and M62TU Engine The Cooling System When fitted to the E31, E32, E38 and E39, the cooling system contains 12 litres of coolant which is circulated by a belt-driven centrifugal water pump. Engine Coolant Temperature Sensor-Coolant Temp Sensor 4 Seasons 36424 Parts Marvel is a family run business for 40+ years. Recently Added Items. Engine coolant prevents the water from boiling; and it also lubricates the engine block and the radiator; preventing rust formation. The coolant temperature sensor is considered as the "brain" of the engine cooling system. 5 VQ35DE engine. The Coolant Temperature sensor is critical to many PCM functions such as fuel injection, ignition timing, variable valve timing, and transmission shifting. Supplement the engine coolant (Refer to "Cooling System" in EM group). MPFI 86-88 4 Cyl. ECU 000110. I guess I need to replace it anyway, but does an ECT replacement sound like it would fix my problems?. yes, it is under the intake mounted in the coolent bridge, between the heads in the back of the engine. This provides a reference signal to the PCM, which indicates engine coolant temperature. Step 2 - Locate Coolant Temperature Sensor. If you get a sensor from the dealer it will have some red sealer on the threads that makes it ready to install. For Buick LeSabre 2000-2005. 1F2-54 M161 ENGINE CONTROLS ENGINE COOLANT TEMPERATURE (ECT) SENSOR YAA1F590 Engine Coolant Temperature (ECT) sensor detects coolant temperature and supplies information to the ECM. 9cdti, vectra c 1. [Solved] Engine Coolant Temperature Sensor location? Discussion in ' Gen 3 Prius Care, Maintenance & Troubleshooting ' started by Digestion_08 , Sep 10, 2016. 00 (US) depending on the type of car and the location of the sensor. I just changed mine but I have the 4 cylinder engine. Drain the engine coolant. Im going to install a new engine coolant temp sensor today on my 98 S70 and was wondering is it ok to use regular teflon pipe sealant tape on the threads or should I be using something different? Thanks. I have bought a coolant temperature sensor and just need instructions as how to replace it.