Question about 2000 Ford Focus

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I have replaced the temperature sensor (black ring on the new one), but the monitoring device on the dash-board indicates higher temperature then it is in reality. Which color of sensor should I install to correct the indicator? My car is FORD Sierra Diesel 1.8. Manufactured in 1993

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Did you bleed the coolant system after the install?
Normally it is just to start the engine and let it cool down,Then remove the switch again and fill the coolant from that hole.
Do you get constant heat from the system?Or do you get warm then hot air.If so it is a bleeding issue.

Posted on Aug 01, 2009

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Posted on Jan 02, 2017

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Why does Temperature gauge reads hotter then normal but engine temp. is ok


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Aug 15, 2014 | 2002 Audi TT

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Engine runs rough if it warms up won't start dtc codes p0118 and p0113 just did head gasket and replaced exhaust manifold all new gaskets new plugs wires and coolant engine timing marks are all c


P0113 Intake Air Temperature Circuit High Input


Low temperature results in a high signal voltage. When the PCM sees a signal voltage higher than 5 volts, it sets this P0113 check engine light code.

P0118 - The engine coolant temperature (ECT) sensor is a thermistor screwed into a coolant passage in the cylinder head. Sensor resistance is high when coolant temperature is low and resistance drops when coolant temperature increases. The powertrain control module (PCM) provides a 5 volt reference and a ground to the sensor. The PCM monitors voltage drop to determine coolant temperature. If the ECT reads less than freezing temp. when engine has been running for more than a few minutes, the PCM determines a circuit fault and sets this code. Or if the PCM determines the sensor resistance is out of specs, this code is set.
Potential Symptoms

Symptoms of a P0118 could include:

  • Very poor fuel economyicon1.png
  • A no start condition
  • Vehicle may start, but run very poorly, blowing black smoke, running very rough and misfiring
  • Illumination of MIL
Causes

A code P0118 may mean that one or more of the following has happened:

  • A bad connection at the sensor
  • An open in the ground circuit between the ECT sensor and the PCM
  • A short in the voltage feed between the sensor and the PCM
  • A bad PCM (less likely)
  • A bad temperature sensor (shorted internally)

Jan 04, 2013 | 2003 Dodge Stratus

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Code P0113-P0183


DTC P0113 - Intake Air Temperature Circuit High Input.The powertrain control module (PCM) monitors the temperature of the air entering the engine. The PCM supplies a 5 volt reference voltage to the Intake Air Temperature (IAT) sensor. The IAT is a thermistor that varies resistance based on temperature. As the temperature increases, resistance decreases. Low temperature results in a high signal voltage. When the PCM sees a signal voltage higher than 5 volts, it sets this P0113 check engine light code.


DTC P0183 - Fuel Temperature Sensor Circuit High Voltage.


I suggest to check wire connections.

Apr 13, 2012 | 2005 Nissan Quest 3.5

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Engine temperature coolant sensor


Your description indicates the engine/coolant thermostat is faulty and allowing at least some coolant to continue circulating so at higher road speeds the engine is over cooled.

Apr 03, 2017 | 2003 Jaguar S-Type

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P0128 (and P0116) on 2006 GMC Sierra v-8, 5.3L, 4x4. Originally getting low temp readings on guage. After replacing the thermostat, the problem seemed to be fixed. A few days later, I was getting my...


P0116 - Engine Coolant Temperature (ECT) Circuit Range/Performance Problem
The ECT (Engine coolant temperature) sensor is a thermistor which changes resistance based on temperature of the coolant in contact with it. The ECT sensor will be located in the block or coolant passage. Usually it is a two wire sensor. One wire is a 5 Volt supply from the PCM (Powertrain Control Module) to the ECT. The other is a ground to the ECT.

As the temperature of the coolant changes the resistance on the signal wire changes accordingly. The PCM monitors the reading and determines coolant temperature in order to perform essential engine fuel management. When engine coolant is low, sensor resistance is high. The PCM will see a high signal voltage (low temperature). When coolant is warm, the sensor's resistance is low and the PCM will see a high temperature. The PCM expects to see slow resistance changes on the ECT signal circuit. If it sees a quick change in voltage that isn't consistent with an engine warming up, this P0116 code will set. Or if it sees a lack of change in ECT signal, this code may set.

Symptoms: There may be no noticeable symptoms if the problem is very intermittent, however the following may occur:
MIL (Malfunction Indicator Lamp) illumination
Poor drivability
Black smoke at tailpipe
Poor fuel economy
May not idle
May exhibit stalling or misfires

Causes: Potential causes of the P0116 code include:
Missing or stuck-open thermostat
Bad ECT sensor
Short or open on signal wire
Short or open on ground wire
Poor connections in wiring

Possible Solutions: If there are any other ECT sensor codes, diagnose them first.
Using a scan tool, check the ECT reading. On a cold engine, it should match the IAT reading or should be equal to ambient (outside) temperature reading. If it does match the IAT or ambient temp, check the freeze frame data on your scan tool (if equipped). The saved data should tell you what the ECT reading was when the fault occurred.

a) If the saved info indicates that the engine coolant reading was at the coldest exreme (around -30 deg. F) then that's a good indication the ECT resistance was intermittently high (unless you live in Anchorage!) Check for an open in the ECT sensor ground and signal circuits and repair as necessary. If they appear okay, warm the engine up while monitoring the ECT for any intermittent jumps high or low. If there are replace the ECT.

b) If the saved info indicates that the engine coolant reading was at the warmest exreme (around 250+ deg.F) then that's a good indication the ECT resistance was intermittently low. Check for a short to ground on the signal circuit and repair as necessary. If it appears okay, warm the engine up while monitoring the ECT for any intermittent jumps high or low. If there are replace the ECT.

Other ECT sensor and circuit related DTCs: P0115, P0117, P0118, P0119, P0125, P0128
--------------------------------------------------------------------------------------------------------------------

P0128 Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature)
This means that the engine's PCM detected that the engine has not reached the required temperature level within a specified amount of time after starting the engine. The intent of the P0128 code is to indicate a faulty thermostat. Similar codes: P0125

In determining the engine did not reach a "normal" temperature, it takes into account the length of time the vehicle has been running, the intake air temperature (IAT) sensor reading, the engine coolant temperature (ECT) sensor reading, and the speed of the vehicle.

Symptoms: You will likely not notice any drivability problems other than the MIL illumination.

Causes: 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
If Nissan vehicle, check for Technical Service Bulletins (TSBs), as the ECM may need to be reprogrammed to correct the P0128 code



These codes are telling you that the engine temperature is not sufficient. This can be caused by a faulty coolant sensor,air in the cooling system,or a faulty computer.
The engine should run at 190 F & higher when warmed up. Scan the computer system to view engine temperature.

Keep us updated.

Oct 01, 2011 | 2006 GMC Sierra

1 Answer

98 Oldsmobile Silhouette I could drive all day and the dang thermometer only moves one notch, Motor wont get warm and i don't want to mess up the van. I bought a thermometer but it's a bit of work if...


Keep in mind the temperature sender that indicates on the dash board is quite separate to the temperature sensor used by the cars power control module to set injection parameters etc. The dash board is to keep you happy the sensor keeps the engine happy. The thermometer sender is just a heat sensitive resistor (thermistor) and only as two wires to it. One wire is from the voltage supply and the other is to the dash board gauge (effectively a voltmeter) which monitor temperature by monitoring the voltage output due to the resistance of the thermistor in accord with the coolant temperature. First check that the connection with the sender is clean and free of corrosion. Put a voltmeter across the sender pins and turn the engine on. Measure the voltage change with temperature. If the voltage does change as the engine warms but the gauge on the dash is stubborn then it is likely that there is something wrong at the gauge. If there is not voltage change with engine warming then the sender is faulty.

Mar 27, 2011 | Oldsmobile Silhouette Cars & Trucks

1 Answer

TEMPERATURE GAUGE IS ALWAYS SHOWING BLUE AND STAYS LIT


Might have to check the temperature sensor to confirm, remove the sensor and observe for change in the dash indication, If so the dash board representation is correct and the sensor is faulty.

Dec 14, 2010 | 2001 Volkswagen Beetle

1 Answer

Temperature sensor causing check engine indicator to come on...how do I change it how do I change a glow plug


The temperature sensor/ECT/ is black squire 4 pins sensor with pinlock.Before changing ensure there is not pressure in engine coolant system by opening engine coolant tank.Be very carefull ! If the engine is on operation temperature there is about 1bar pressure.If so open the cup of the tank slowly and wait the pressure going out.Pse note when you pullout the sensor the O-ring always stayng in.Take it out before fitting the new one.

Apr 25, 2010 | 2002 Volkswagen Jetta TDI

1 Answer

Cooling fan operation


sounds to me like the thermostat is sticking and allowing the car to overheat. with the a/c on the fan comes on and runs constantly to keep the engine cool

Oct 22, 2009 | 2000 Ford Focus

1 Answer

The message center shows incorrect outdoor temperature. It reads about 25 degrees higher than outside temp.


I would suspect that the connection to the outside temperature sensor is not good or the sensor itself is bad. Check the connection and clean and reattach as necessary. Otherwise replace the sensor. I think they're pretty reasonably priced.

The outside air temperature sensor for a 2000 Windstar is located under the front bumber on the passengers side. It is clearly visible if you lay down and look through the lower two air openings in the plastic bumper. It is the only electrical device in that area and it is made of black plastic.

Sep 22, 2009 | 2000 Ford Windstar

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