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Thread: The two thermosensors

  1. #1
    DX User
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    The two thermosensors

    Hey there, you know how some of our cars have not one, but two thermosensors checking coolant temperature? A green one and a cream one? Well, both of mine broke.
    I managed to find replacement pigtails online, thankfully, but unfortunately, they are slightly different from eachother
    With the plug facing you and the clip on top, one has a notch on the lower left and one has a notch on the lower right.
    I think the lower left one is the odd ball, cause I can only find ones with the lower right notch online.
    Does anyone know what this is or what it does? Maybe that will help my search.

    It's an 86 Accord LXi automatic. I have the repair manual and can't find a mention of the second one.



  2. #2

    ShiRen's Avatar
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    Re: The two thermosensors

    You could always trim the notch off the one you can't find, just don't mix them up

  3. #3
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    Re: The two thermosensors

    Yeah I was thinking that. It probably is the same mechanics, just as long as the same wires are connected. I'm still curious what the difference between them is. Does one happen to deal with cold start settings? Cause that started to be a problem after I noticed one was broken.

  4. #4

    ShiRen's Avatar
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    Re: The two thermosensors

    I would have to see which ones they are before I can tell you from the manual, I don't have an efi car

  5. #5


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    Re: The two thermosensors

    https://www.3geez.com/forum/showthre...-Clarification

    This might help you but Im sure the 86 fuel injection has some different sensors than all the latter year cars.
    1988 Lxi owner since August 1995
    336k miles running strong!
    Now running E85.

    Oldblueaccord

  6. #6

    ShiRen's Avatar
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    Re: The two thermosensors

    If its the white cooling fans plug that one is on every car, you can go to a parts yard and find it on a lot of hondas. On the earlier carbed cars the sensor is in the bottom of the radiator

  7. #7
    LX User AWH's Avatar
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    Re: The two thermosensors

    One of them indeed affect cold starts, or starting in general. Because it reads wrong temp., the fuel mixture is set wrong as well, hence the bad starts. Not sure which one though, but you will have to replace both anyways, so that should solve it.

    Verstuurd vanaf mijn XQ-AU52 met Tapatalk

  8. #8

    conozo's Avatar
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    Re: The two thermosensors

    This is one of the sensors. I believe the cooling fan one which is very common.

    https://smile.amazon.com/gp/product/...?ie=UTF8&psc=1


    Here may be the cold start sensor - closer to the engine block
    12021 Tomco
    search for it on ebay there are a couple for sale.
    https://www.ebay.com/itm/40182588127...kAAOSwgn1dOJ8p
    Last edited by conozo; Today at 09:51 AM.

    1988 Honda Accord LSDX-I

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