Question about 2001 Mitsubishi Montero Sport 4WD

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Coolant sensor Gauge runs hot

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If you have replaced the coolant it may have trapped air..you fix this by allowing the vehicle to idle with radiator cap off and allow to get to operation temp ever so ofter squeeze the lower radiator pipe this will help move out trapped air when the thermostat opens it will draw the coolant down just add water when it does..if the thermostat doesnt open you may have a bad or stuck closed thermostat. On bad news side if the temp shoots up under acceleration and drops off to norm on deceleration you either have a blown head gasket or cracked head.

Posted on Feb 14, 2014

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1 Answer

Coolant sensor


Jeff, you haven't said what the problem is or what vehicle you have.

However, be aware that some vehicles have two coolant sensors.

One sensor sends a signal to the ECU to help control the running of the engine. The other sensor sends a signal to the temperature gauge on your dashboard - it shows you what temperature the engine is at - i.e cold, normal or hot.

If your vehicle has two coolant sensors, failure of the first type would more than likely illuminate an engine check light.

Failure of the second type would cause the dash temperature gauge to permanently read cold or hot, irrespective of the true engine temperature.

To locate this second type of sensor, look in the area of the thermostat housing. It screws into the engine block and will have 1 or 2 wires connected to it.

The link below shows generic images of this second type of sensor:

coolant temperature sensor Google Search

Apr 18, 2016 | Cars & Trucks

2 Answers

My 2006 Caravan temperature gauge goes to red - engine is not overheating. Kick it into a lower gear (automatic trans) and the gauge comes back down. Is it likely the coolant sensor?


Could be.. is the system FULL? Air in it can cause some odd things. When engine and coolant are COLD (as in after sitting over night), open the radiator cap. Top off the overflow res with a 50/50 antifreeze / water mixture to HOT mark. Start engine, turn heat to hot and fan to high. Top off RADIATOR with same 50/50 mixture slowly & gradually. As the coolant circulates, it should bring any AIR trapped in the system (from heater core & engine block) to the radiator where you can replace it with the 50/50 mix. Once the coolant is HOT and stays level - about an inch under the opening, close the radiator. Monitor the overflow res and add as needed. Good luck!

Sep 23, 2015 | 2006 Dodge Grand Caravan

1 Answer

My A/C ONLY WORKS IF THE COOLANT TEMP GAUGE WORKS IVE CHANGED THE COOLANT TEMP SENSOR AND LOW PRESSURE SENSOR WHAT CAN I DO NEXT


have you had the coolant itself checked , may not have enough in system , this could stop the gauge registering as only reads hot water/coolant not hot air/steam

Jun 11, 2015 | 2008 Chevrolet TrailBlazer LT

1 Answer

Temp/gauge not reaching normal working temp-richer


the first thing to check is to feel if the radiator is hot, if the radiator feels hot and the engine is also hot the coolant is circulating ok then the problem is more than likely electrical, the temp gauge gets its signal from the engine control module the coolant temp sensor sends coolant temp signal to engine control module for engine managment purposes then passes it to instument pack/gauge, if the sensor was at fault you would have engine running problems also,with poss fault codes logged, if the engine and rad are cold/only warm after the engine has been run for 15 mins or so it sounds like the thermostat is stuck open but you have changed that. i have had faulty new ones in the past and have had to test them in a pan of boiling water, hope this is some help to you.

Apr 02, 2015 | 2006 Jaguar X-Type 2.0

2 Answers

How does a car run cold


... A faulty coolant sensor that always reads cold may cause the fuel control system to run rich, it may be sending the wrong info to the computer and the guage. make sure there is no air in the coolant system, and it is full. see if coolant resorvoir is full when hot. if all is ok, change coolant sensor. good-day!

Apr 13, 2014 | 2001 Chevrolet Camaro

1 Answer

2001 chevy malibu temp gauge stopped working.. car didn't run hot but coolant was also empty. But saw a signs of a leak. Replaced coolant and after 20 mins.. gauge worked again.. not sure if it was a...


With no Hot Coolant going past the Sensor, you get a false reading.
Low coolant is why the sensor wasnot telling you the engine was running hot.

Oct 03, 2012 | Cars & Trucks

2 Answers

1998 nissan maxima runs hot, replaced the thermostat and at times gauge still register hot, what else could cause this?


Its possible that your problem also stay in the Engine Coolant Temperature (ECT) sensor resistance changes in response to engine coolant temperature.

Keep in mindthat the sensor resistance decreases as coolant temperature increases. This provides a reference signal, which indicates engine coolant temperature, to the ECM.



10_12_2011_2_44_56_pm.gif

Fig.: Compare the sensor readings with these values



10_12_2011_2_47_01_pm.gif

Fig.: Location of the thermal sending unit (A) next to the coolant temperature sensor (B)

Keep us updated.

Oct 12, 2011 | 1998 Nissan Maxima

2 Answers

I HAVE A 2000 Toyota Corolla CE IT SAY IT HOT BUT ITS NOT WHAT CAN IT BE


low on coolant - steam going across the sensor instead of coolant will give a false reading. bad temp gauge sensor or a bad gauge and also does it go straight to hot as soon as you start the car when it is cold like first thing in the morning or does it gradually start climbing and will it run hotter or cooler when ac is on or when stopped or going down the road. let me know and give more info hope this helped.

Jun 17, 2011 | 2000 Toyota Corolla

3 Answers

2002 malibu runs hot.


Sounds like you have a faulty head gasket or maybe a cracked head.This can cause overheating and the check engine light to come on.The code for the o2 sensor is probably caused by coolant getting into the exhaust system and coating the sensor.The coolant fan may work but it cannot remove enough heat from the rad to make the engine cool off.Try some engine coolant stop leak to see if it will help.This maybe only a temperary fix.Let me know if you need more.MOE

Jun 22, 2010 | 2002 Chevrolet Malibu

2 Answers

GMC Sonoma SLE 4.3L 1991- Coolant Temp Gauge Not reading


there are 2 coolant sensors one for gauge and one for ecm

Jul 23, 2009 | 1991 GMC Sonoma

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