Question about 1996 Subaru Legacy

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Replacement of coolant temperature sensor location of coolant temperature sensor on 2.5 gt

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  • Anonymous Mar 14, 2014

    what are the symptoms of a bad coolant temperature sensor

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Located under intake in water crossover pipe,you can access the sensor by removing intake chamber box,then pcv hose connected to the block,the connector is orangeish 2pin,use a 19mmdeep socket on a 3/8 ratchet to get it loose,make sure engine is cool,also make sure there is a new brass washer with your new sensor,sometimes the old washer comes off when removing the sensor,sometimes it sticks to the pipe,some coolant will escape so make sure to top it off

Posted on Jul 14, 2009

  • ron pratt Sep 03, 2013

    thank you ,but I still don't see it. Do I need to remove intake

  • ron pratt Sep 03, 2013

    my book say its on the engine head but do not see it,they show it with intake manifold removed ?

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Where is p2181 located in my 2003passar motor


Potential Causes:
- Connector
- Defective Coolant Temperature Sensor (CTS) Wiring
- Defective Thermostat

Tests/procedures
1. Measure engine temperature and ensure it is getting up to proper operating temperature.
2. Connect a Volkswagen-compatible scan tool and monitor engine temperature on the scan tool. Compare to the actual engine temperature to determine if the coolant sensor is working correctly.

Nov 01, 2016 | Cars & Trucks

1 Answer

Codes p0128


A code P0128 may mean that one or more of the following has happened: Low engine coolant level Leaking or stuck open thermostat Faulty cooling fan (running too much) Faulty coolant temperature (ECT) sensor Faulty intake air temperature (IAT) sensor Possible Solutions Past experience indicates that the most likely solution is to replace the thermostat. However here are some suggestions on troubleshooting and repairing a P0128 OBD-II code: Verify coolant strength & level Verify proper cooling fan operation (check if it's running more than it should). Replace if necessary. Verify proper engine coolant temperature (ECT) sensor operation, replace if necessary. Verify proper intake air temperature (IAT) sensor operation, replace if necessary. If the above items check out good, replace the thermostat

Aug 09, 2014 | 2007 Pontiac G6 GT Convertible

1 Answer

P0128 code on 2006 ford escape, solutions?


Diagnostic Test Code (DTC) P0128 has a generic description of "Coolant Temperature Below Thermostat Regulating Temperature".

The Poertrain Control Module (PCM) checks the coolant temperature at startup. It then calculates the period of time that it should take for the engine to reach operating temperature (or thermostat regulated temperature). After the calculated period of time, the PCM again checks the coolant temperature. If it has not reached operating temperature, a code P0128 flag is set in mode 6.

If the engine still has not reached operating temperature after 5 more minutes of continuous engine operation, code P0128 is set in continuous memory and the Check Engine (or Malfunction Indicator Light "MIL" is turned on.

Possible causes:

> A stuck-open engine coolant thermostat (MOST common)
> A skewed Engine Coolant Temperature (ECT) or Cylinder Head Temperature(CHT) sensor (working, but not reading correct temperature)
> Low engine coolant level (causing the sensor to not read correctly)

First, the engine coolant (antifreeze) level should be checked. If it is low, it is recommended to perform a cooling system pressure test to find out WHY.

Then, the actual engine temperature should be measured with an infrared thermometer near the ECT or CHT. The reading from the thermometer should be checked against the live sensor data with a scan tool. (PLease note that MOST generic OBD code readers CANNOT perform this function.)

If the reading from the thermometer and the sensor data is within 10 degrees F of each other, replace the thermostat. Otherwise, the sensor circuit should be checked for high resistance (loose or corroded connector, damagd wire, etc.). If no high resistance is measured in the rest of the circuit, the sensor should be replaced.

Jan 03, 2012 | Ford Escape Cars & Trucks

1 Answer

Location of engine coolant temperature sensor


Automobiles: 2000 Ford Escort ZX2 4-cylinder 2.0L MFI DOHC

NOTE
The "left" side of the engine is the driver's side.

The Engine Coolant Temperature (ECT) sensor is a thermistor (a device which changes resistance or voltage as temperature changes). The sensor detects the temperature of engine coolant and provides a corresponding signal to the PCM (Powertrain Control Module - aka "the car's computer").

The ECT sensor is mounted in the following locations (small Ford engines):

1.8L engines: in the cylinder head
1.9L engines: threaded into the heater hose inlet pipe
2.0L engines: at the left rear of the engine

2.0L Zetec Engine

(1) Partially drain the engine cooling system using a clean container. If coolant is in good condition, retain for reuse.
(2) Disconnect the battery ground cable.
(3) Disconnect the electrical wiring connector from the engine coolant temperature (ECT) sensor.
(4) Remove the retaining clip and the ECT sensor.


12_5_2011_5_38_05_pm.jpg

Fig. 1 Escort ZX2 ECT sensor - The retaining clip is removed (at the solid arrow). Withdraw ECT sensor by gently wiggling/pulling in the direction of the dashed arrow.

To install:

NOTE
Coat the ECT sensor O-ring with clean coolant prior to installation.

(1) Replace the retaining clip and the ECT sensor.
(2) Connect the electrical wiring connector from the Engine Coolant Temperature (ECT) sensor.
(3) Connect the battery ground cable.
(4) Refill the engine cooling system. An inexpensive plastic "Radiator Funnel" will help with this task.

Dec 05, 2011 | 2000 Ford Escort

1 Answer

THE "SWITCH" GOES BAD EVERY


Please look at the list below, keeping in mind that this is not an exhaustive list of the switches that your vehicle is equipped with. After staring at the list for a while, tell me what is wrong with your question.

>> A/C High Pressure Switch
>> A/C Low Pressure Switch
>> A/C Refrigerant Pressure Sensor / Switch
>> Ambient Temperature Sensor / Switch HVAC
>> Blower Motor Switch
>> Brake Fluid Level Sensor/Switch
>> Brake Fluid Pressure Sensor/Switch
>> Brake Light Switch
>> Brake Switch (Cruise Control)
>> Cabin Temperature Sensor / Switch
>> Combination Switch
>> Coolant Temperature Sensor/Switch (For Computer)
>> Cruise Control Switch
>> Door Jam Switch
>> Door Sensor/Switch (For Alarm)
>> Door Switch
>> Driver Information Center (DIC) Switch
>> Engine - Coolant Temperature Sensor/Switch
>> Fluid Pressure Sensor/Switch
>> Fog/Driving Lamp Switch
>> Fuel Door Switch
>> Garage Door Opener Switch
>> Glove Box Lamp Switch
>> Hazard Warning Switch
>> Headlamp Dimmer Switch
>> Headlamp Switch
>> Heated Glass Element Switch
>> High Pressure Sensor / Switch
>> Hood Switch / Sensor
>> Horn Switch
>> Ignition Switch
>> Ignition Switch, Buzzer
>> Low Pressure Sensor / Switch
>> Neutral Safety Switch
>> Parking Brake Release Switch
>> Parking Brake Warning Switch
>> Power Door Lock Switch
>> Power Mirror Switch
>> Power Seat Switch
>> Power Window Switch
>> Pressure Cycling Switch
>> Rear Defogger Switch
>> Refrigerant Pressure Sensor / Switch
>> Remote Switch
>> Seat Belt Buckle Switch
>> Seat Heater Switch
>> Seat Memory Switch
>> Shift Interlock Switch
>> Sunroof / Moonroof Switch
>> Telescoping Wheel Switch
>> Tilt Wheel Switch
>> Traction Control Switch
>> Transmission Mode Switch
>> Transmission Temperature Sensor/Switch, A/T
>> Trunk / Liftgate Switch
>> Trunk/Liftgate Sensor/Switch (For Alarm)
>> Turn Signal Switch
>> Underhood Lamp Switch
>> Valet Switch
>> Washer Fluid Level Switch
>> Windshield Washer Switch

Aug 17, 2011 | 2001 Cadillac DeVille

1 Answer

The check enging light comes on then goes off. I foud out the code po118 engine coolant temp circut high input. is it the coolant temp sensor. if so how do I replace it. It is on a 2004 jetta tdi


According to Autozone.com:

Because ECT (engine coolant temperature) sensor procedures vary depending upon their location, first locate the part. You may need to partially drain the engine coolant to prevent coolant spillage.
  • Disconnect the negative battery cable.
  • Unplug the ECT.
  • Then, unscrew it.
  • Reverse the removal procedures to install the new part.
  • Connect the negative battery cable to the battery.



    Related Parts:
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Coolant Temperature Sensor printpage_icon.gif



0900c152801bfc38.jpg enlarge_icon.gifenlarge_tooltip.gif

Fig. Remove the coolant temperature sensor
The coolant temperature gauge sensor is a temperature-variable resistor, or thermistor. As coolant temperature increases, the resistance of the sensor decreases or decreases, depending on the type of sensor.
A1 and A2 platforms use a different type of circuit that A3 vehicles. On A1 and A2 vehicles, the circuit is a "resistance to ground" type. A3 vehicles use a "variable voltage" type, where a voltage is supplied to the sensor. Because of the circuitry design on A3 vehicles, testing of the coolant temperature gauge is limited.
The engine coolant temperature gauge uses a heat sensitive sending unit to transmit an electrical signal to the gauge. The sending unit is a heat sensitive variable resistor that is located on or near to the cylinder head and threads into an engine coolant passage. The sensors are a Negative Temperature Coefficient (NTC) type. As the temperature increases, the electrical resistance of the sensor decreases. As the coolant temperature changes, so does the resistance of the sensor. The gauge is calibrated within the operating range of the sensor and interprets the resistance value to display the coolant temperature.
Beginning with model year 1994, the engine coolant gauge and the Engine Control Module (ECM) temperature sensors were combined into one sensor with 4 terminals. The basic operation remains the same in that their resistance decreases as the coolant temperature increases, however the actual resistance values of the 2 sensor circuits are different. The electrical connector of the 4-wire terminal sensor ( 1 and 2 ) is keyed to prevent improper connection of the sensor's electrical circuit.

0900c152801bfc39.jpg enlarge_icon.gifenlarge_tooltip.gif

Fig. Beginning with model year 1994, the Engine Coolant Temperature Sensors combined the sensors for the ECM and the gauge into one sensor-1997 2.8L V6 sensor shown


0900c152801bfc3a.jpg enlarge_icon.gifenlarge_tooltip.gif

Fig. The electrical connector for the combined temperature sensors is keyed to avoid improperly connecting the sensor's wiring-1997 2.8L V6 connector shown

Oct 17, 2010 | 2004 Volkswagen Jetta

2 Answers

Where can i find the temperture sensor


THE 4.9L ENGINES COOLANT TEMPERATURE SENSOR IS ON THE THERMOSTAT HOUSING. WHICH IS LOCATED BEHIND THE DISTRIBUTOR. THE 4.6L ENGINES COOLANT TEMPERATURE SENSOR IS LOCATED ON THE BACK SIDE ENGINE THE SIDE FACING TOWARD THE FIREWALL BELOW THE EGR VALVE.

Jan 23, 2010 | 1997 Cadillac DeVille

2 Answers

Where is the computer located in a 1992 isuzu amigo?


Because the ambient temperature is more likely to be tolerable for the semiconductors in your ECU, these4 are normally installed inside the passenger compartment, often under the dashboard.
It shouldn't be too difficult to locate, look for a box with a large number of wires in the connector(s) attached to it.

Oct 25, 2009 | 1992 Isuzu Amigo

2 Answers

Heating System


The Engine Coolant Temperature (ECT) sensor is mounted in the intake manifold and sends engine temperature information to the ECM. The ECM supplies 5 volts to the coolant temperature sensor circuit. The sensor is a thermistor which changes internal resistance as temperature changes. When the sensor is cold (internal resistance high), the ECM monitors a high signal voltage which it interprets as a cold engine. As the sensor warms (internal resistance low), the ECM monitors a low signal voltage which it interprets as warm engine.
0900c1528008f125.jpgFig. 1: View of the Engine Coolant Temperature (ECT) sensor 0900c1528008f126.jpgFig. 2: Engine Coolant Temperature (ECT) sensor locationTESTING
See Figures 3 and 4
  1. Remove the ECT sensor from the vehicle.
  2. Immerse the tip of the sensor in container of water.
  3. Connect a digital ohmmeter to the two terminals of the sensor.
  4. Using a calibrated thermometer, compare the resistance of the sensor to the temperature of the water. Refer to the engine coolant sensor temperature vs. resistance illustration.
  5. Repeat the test at two other temperature points, heating or cooling the water as necessary.
  6. If the sensor does not meet specification, it must be replaced.
0900c1528008f120.jpgFig. 3: Intake Air Temperature (IAT) and Engine Coolant Temperature (ECT) sensor wiring diagram 0900c1528008f095.jpgFig. 4: ECT sensor temperature vs. resistance values

Oct 01, 2008 | 1993 GMC Sierra

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