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BMW E46 Coupe 2002 coolant light

  • 09-07-2020 12:16pm
    #1
    Trebhygt
    Registered Users Posts: 111 ✭✭


    The coolant light on dashboard won,t come on at any stage, especially when initial start up, for that few seconds.
    Have ordered a new level sensor to see if that was the problem...am sure there is no specific fuse for the coolant light, maybe a bulb ?
    Problem started after mechanic never attached radiator hose properly, resulting in it becoming detached and 3/4 pts.of coolant spraying the engine bay.
    Any ideas ?
    Thanks.


Comments

  • #2
    vectra
    Registered Users, Registered Users 2 Posts: 15,590 ✭✭✭✭vectra


    As far as I am aware those E46's had a cooling issue, and parts need replacing.
    Anyhow, wrong forum. I will get a mod to move it to Motors as you would get better response there.


  • #3
    selectamatic
    Registered Users, Registered Users 2 Posts: 4,005 ✭✭✭selectamatic


    It's also not unheard of for e46's to develop funny dash light problems where certain lights just stop working due to k-bus/canbus problems.

    But since your issue has came up after work on the cooling system it's most likely a wiring/sensor issue there.


  • #4
    Alanstrainor
    Registered Users, Registered Users 2 Posts: 23,157 ✭✭✭✭Alanstrainor


    selectamatic wrote: »
    It's also not unheard of for e46's to develop funny dash light problems where certain lights just stop working due to k-bus/canbus problems.

    But since your issue has came up after work on the cooling system it's most likely a wiring/sensor issue there.

    I've not heard of these dash light problems in all my years with an e46, at least not commonly.

    e46 are well known for cooling issues. But honestly, if the coolant was recently refilled it could be that the system has not been properly bled. If there's air in the system, you'll see the coolant light come on intermittently.

    But, given that it's an e46, and the age of the car there could also be any number of coolant leaks. A proper investigation is needed to root cause this issue. First step is to check the coolant level when the engine is cold.


  • #5
    selectamatic
    Registered Users, Registered Users 2 Posts: 4,005 ✭✭✭selectamatic


    Alanstrainor wrote: »
    I've not heard of these dash light problems in all my years with an e46, at least not commonly.


    Not common but not unheard of.

    My own e46 presented with some such problems a few months ago. (Indicator dash lights not working but indicators working, light to show lights are on not working but headlights working a few other discrepancies too) found plenty of posts about similar problems after a bit of searching on Google.

    The car had been laid up for about a month but everything just fixed itself eventually after a bit of driving over the course of about a fortnight . Dash light to show lights are on still isn't working but the blue heads dash light is and the front fog lights dash light is back working too.

    As I said though the ops problem has most likely been caused by the work done on the cooling system.


  • #6
    Leonard Hofstadter
    Registered Users, Registered Users 2 Posts: 5,541 ✭✭✭Leonard Hofstadter


    Trebhygt wrote: »
    The coolant light on dashboard won,t come on at any stage, especially when initial start up, for that few seconds.
    Have ordered a new level sensor to see if that was the problem...am sure there is no specific fuse for the coolant light, maybe a bulb ?
    Problem started after mechanic never attached radiator hose properly, resulting in it becoming detached and 3/4 pts.of coolant spraying the engine bay.
    Any ideas ?
    Thanks.

    If there is enough coolant you should never see the light come on, even when you turn on the ignition and all the other lights come on.

    The only time I've ever seen it come on in my one is when I do the hidden menu test.

    That said, it does sound like there is an issue with yours based on what's contained in your OP. They are well known for cracking expansion tanks; they also develops leaks through the radiator and associated hoses.


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  • #7
    Trebhygt
    Registered Users Posts: 111 ✭✭Trebhygt


    Leonard Hofstadter wrote: »
    If there is enough coolant you should never see the light come on, even when you turn on the ignition and all the other lights come on.

    The only time I've ever seen it come on in my one is when I do the hidden menu test.

    That said, it does sound like there is an issue with yours based on what's contained in your OP. They are well known for cracking expansion tanks; they also develops leaks through the radiator and associated hoses.

    Took over 2 litres of coolant out, drove car and as you said, light only ever comes on when coolant low and never on start up.
    Thanks for that.ðŸ‘


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