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coolant temp too low?

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Old 01-02-2010, 08:30 PM
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Default coolant temp too low?
Driving down the 401 with my heat on in -12 weather.... my check engine light came on at the same time as my coolant temp hit just below 60. Turn the heat off and it gets up to about 75, but thats as high as i could get it to go. Its the second time it has done this, and it doesnt make me very happy. The light stayed on untill the weather hit about 0 and i was doing city driving. Anyone else have this problem and know the solution?

Its a 2000 a4 b5 2.8
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Old 01-02-2010, 11:39 PM
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Default Re: coolant temp too low?
Coolant temp sensor, VAGcom it though.
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Old 01-03-2010, 05:55 PM
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Default Re: coolant temp too low?
Anyone in the kw area able to help me out with some vag magic? I have beers!
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Old 01-05-2010, 12:21 PM
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Default Re: coolant temp too low?
there is plenty of manuals on net
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Old 01-05-2010, 12:21 PM
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Default Re: coolant temp too low?
try pdfs too
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Old 01-05-2010, 02:43 PM
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Default Re: coolant temp too low?
that doesn't really sound like a temp sensor to me. Sounds like a Thermostat issue. If it is stuck open the coolant won't get a chance to heat up.
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Old 01-06-2010, 07:09 PM
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Default Re: coolant temp too low?
i asked ..with same problem i changed the thermostat and still have cold coolant ,so it might be sensor you think?
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Old 01-06-2010, 07:16 PM
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Default Re: coolant temp too low?
I guess it could be, does your heater blow hot?
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Old 01-06-2010, 07:18 PM
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Default Re: coolant temp too low?
mostly cold
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