My coolant temp readings in vagcom are incorrect. After the car sits overnight, the report engine temperature is between 95C and 100C, this is clearly wrong.
The temp value slowly wanders up and down.
If I unplug the black 4-pin sensor on the top coolant hose that's right on the engine outlet, the temp reading slowly drops to about 15C and kind of wanders up and down slowly.
This behavior seems extremely weird to me, is it indicative of a sensor failure, or some problem in the wiring?
I have spent a good deal of time searching, but have been unable to find anything quite like this.
EDIT: I should also note that it doesn't matter if the engine is running or stopped (key on), the same thing happens. Also 98 jetta TDI.
The temp value slowly wanders up and down.
If I unplug the black 4-pin sensor on the top coolant hose that's right on the engine outlet, the temp reading slowly drops to about 15C and kind of wanders up and down slowly.
This behavior seems extremely weird to me, is it indicative of a sensor failure, or some problem in the wiring?
I have spent a good deal of time searching, but have been unable to find anything quite like this.
EDIT: I should also note that it doesn't matter if the engine is running or stopped (key on), the same thing happens. Also 98 jetta TDI.
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