Coolant Temp Sender

Tony Hoffman auditony at
Fri Sep 2 05:15:29 PDT 2011

The one that controls the guage and ECU is at the right rear of the engine,
just down from the plastic intake tube with the engine code on it. 4-wire,

There is not one on the radiator, the fans are all controled by that one in
the lower right hose.


On Thu, Sep 1, 2011 at 10:49 PM, mkb <mkb125 at> wrote:

> Hi All,
> So I've got some issues with my 99 A6 28q Avant.  One is the auxilliary fan
> does not come on when the A/C is turned on.  I thought I had fixed this
> issue last year when I installed a new temp sender in the lower right
> radiator hose and fixing the shorted wire.  But this year the problem seems
> to have returned.  The other question I have is how many temp senders does
> A6 have?  I know there is one on the lower right side on the hose just
> before it goes into the radiator.  Should there be one on the lower left
> side in the actual radiator?
> Also, the temp gauge sometimes works but most of the times it just wont
> move.  The t-stat was changed with the t-belt about 2 years ago.
> I might start looking into some of these issues on the w/end or I might
> just put my feet up and relax over the long weekend.  Anyways, ideas
> appreciated so that I can mull over them the next few days.
> --
> mohammed
> 08 A4 2.0tqa
> 99 A6 2.8q avant
> 97 A4 1.8tqa (gone, but not forgotten)
> 88 80q (my first OOOOdi)
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