Most Common Symptoms of Bad Engine Coolant Temperature Sensor | Signs of failing ECT sensor

37 Comments

1. Will it also cause the ac to stop working?

2. My 06 tl recently started to over heat and the radiator fan didn’t kick on, i don’t have a check engine light or black smoke coming out.

3. I have temperature warning flashing, or staying on a while, but it is intermittent. I have P0117 code. not the other. smooth idling, no smoke, normal fuel consumption. thanks.

4. What If i don't have no lights coome to scan what is wrong?What if the sensor is reading higher then it is?

5. I changed my sensor
   My fans worked properly for a few hours then went back to staying on even after my car was off…
   Now the fan will not turn on…
   I replaced my fan a year ago because the blades were broken so I know it works. Because i tested both the old fan and new fan…
   My relay fuse for the low fan has melted plastic on one of its prongs…
   I switched it with a fuse with the same voltage and the fan will not kick on…
   Any advice???

6. I have a Opel Corsa it don't wanna rev up….when I unplugged temperature switch then car starts but don't rev up….when I plug it back in car switch off

7. My 2006 honda city's radiator fan kicks in only when the AC is on ( both the AC condenser fan and radiator fan kick in ) . The Radiator fan doesn't function (without the AC ) even after 15 to 20 minutes of idling . 2) the idling is rough and there's a strong smell of petrol when I start the car . 3) The car is idling at 1500 rpm and after about 10 minutes it settles at 1200 rpm. Are these all point to a bad ECT switch ?

8. My 2018 Honda CRV keeps overheating even when I’ve changed the temperature sensor and surprisingly too the fans work intermittently. What could be the problem ?

9. Can this affect air conditioning too?

10. Right on the note

11. Another Great video

12. Mine is all of the above symptons but also gets a misfire when driving it also is that a flag for that too

13. Shouldn't the temp sensor trip the check engine light on ?

14. Even after changing the temperature sensor i am getting the same issues like fan continuously running and difficult start of engine. What to do check further?

15. Mine went bad after banging limiter in mud. It ran fine other then my AC wouldn’t work.

16. On mines it’s saying engine is hot.. this is without AC being on but car is not running hot and the tan is coming on..

17. I am not sure were the othervtemp sensor is. I will try changing the coolent sensor first. Having a good scan tool may help! Thanks for the update!

18. My ac went out data error say in cluster , temperature gage is down,,help

19. Forgot to mention: A/C won't work

20. Thanks for the good explanation

21. I have a issue when the outside temperature is warm. Engine when started cold, seems running to lean or rich and stumbles for about 15-30 seconds then settles down. When the outside temperture is very cold the car engine starts better without running rough. I have a new dealer sensor . I hope that solves the cold start issues and a rough idle. Car drives fine. I have tried other easy fix's first, but nothing helped.

22. Is it normal that the computer doesnt let me start the car when ECM fails? Because my car suddenly drops its temp reading to 0, and RPMs start to rise. Then when I turn the car off the fan starts. If I try to start the cart, it won't. My workaround has been to unplug the fan relays, plug them back, and then the car starts again. I tested the relays and they work properly, so I assume it's the ECT.

23. So robotic voice still get monitization? This youtube double standard is not fair.

24. Hiya, trying to sort a problem out with my car at the moment, e46 m3, driving back from germany yesterday the gauge was reading hot with the red light on, nothing boiled over, heaters was fine, didnt really notice the fuel smell as my cars map is rich anyways,, i did have a rough idle though, only saying about the sensor as i drove all the way back to the uk with the gauge pinned to red and was fine, once i stop the gauge reads dead cold too. Could this be a faulty sensor. Thanks. 🙂

25. P0128 bad thermostat. Replaced it. But check engine kept coming back. So im assuming it can be bad cooling temp sensor? Cooling fan only come on when the AC is on. No overheating either

26. I replaced 3x the sensor same thing radiator fan don't come on,only made it worse by temperature gauge goes from cold to hot in few second don't understand it

27. I took my 2010 Camry to the Toyota dealer and they diagnosed my cooling sensor to be the issue of my temperature gauge going so high almost one line before it hits red, the temperature gauge kept going up and down and was never down to C anymore when my car was home all night before going to work!

28. Dear sir/viewers
    My ECOSPORT diesel 2018 for which i wanted to flush coolant of it 4 days ago when i put radiator flush in it and start the heater in this summer season as per instructions on bottle kept it on idle the car temperature is starting to drop significantly from 50% operating temperature to 25% what could the problem here as my car temperature stays optimal when i run on ac and fan also works properly but on heater it got dropped to 25% so i feared and turned off the engine. Please tell me what could be the problem here does it have bad thermostat,water pump or any other problem? Please reply
    Thank you.

29. Is it a bad sensor when the car says high coolant temp and the temp gauge fluctuates?

30. 87 toyota pickup 22r changed the entire cooling system and still wants to run hot. Could it be a temp sensor?

31. 2005 police crown vic —- BRO I NEED HELP! been having overheating issues & replaced everything in the system. NOT overheating anymore but the radiator fan goes to high after only 5 mins of running. stays on high fan until shut off. replaced the radiator, water pump, CT sensor, HT sensor, thermostat (160), fresh coolant after 3 flushes. used a laser temp tool & highest reading on cyl or anywhere, is only 160 degrees. fan will be on HIGH with that LOW temp. CANT FIGURE IT OUT & NEED TO SELL!. NO ENGINE CODES.

32. caballero 231 v6 1981 3.8 litre choke light stays on… what is the normal temperature

33. My wife put coolant in and forgot to put coolant tank cap back on we drove like that for a day no problems next day left the house made it a mile and got a engine coolant is overtemp warning i pulled over popped hood coolant was low and bubbling no lid on so let it cool and filled it up put cap back on then tried to start it and it wont even crank or anything electronics in car come on like normal but even now 24hrs later still wont turn over or start and still says engine coolant over temp and shows temp gauge maxxed out. Anyone have any ideas what it could be? I do hear a click under fuse box when attempting to turn over

34. My service manual doesn't even say if this sensor being out of calibration could cause my fast idle speed to be too high. 96 Honda Civic EX. Going to check mine just in case because I do have too high of an idle speed.

35. hey when I turn my key when my car has sit for few hours and I try to start the car it stutters and does not start the engine sign comes up and when I finally do get the car started the fan runs at maximum speed even and for a while after the car has been turned off, also the temperature does not change on the dashboard it stays at lowest temp even when I have driven few miles can you tell me what is the issue?

36. 2007 f 150 temperature raises when driving over 55 and goes back down when driving below 55. I changed the thermostat and the temperature sensor, and it is still the same issue. I'm I missing something?

37. My car a 2006 chevy cobalt ls with a 2.2L ecotec in it only wants to overheat with the ac off, turn it on full blast at max ac and the cars temp comes back into normal operating range

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