Cooling System Fault

[bacha]

Hi, hope that anybody can help me out..

 

Since a cple of weeks i got the System Warning "Cooling System Fault" (Yellow).

 

I check out for aleak and found that problem on the hose connection located at the thermostat. I fix that but the warning still comes around some times.

 

I dont loose Cooilng Fluid, nor the Cooling System and Oiltemperature rises above the allowable value.

 

I connect my Durametric and found 2 things:

1st: In engine module the Fault code P3300 Implausible Signal is active

2nd: I check out the graphs of different measurements: Cooling Fluid Temperatur outlet (Volt and C°) and Motor oil temperature (Volt and C°)

         I saw that that the Sensor for Coling Fluid Temperature outlet show up the Temperature steady but the Voltage rises between 0 and 9 Volt (like a sawtooth voltage, see       atached pic) - That could be the implausible Signal?

 

Now i am wondering if that could be the Temperature Sensor right behind the Radiator (located behind the left Front Wheel). Part Number is 94860642001.

 

Here are my questions:

- Do anybody now the meaning of Code P3300?

- Did anybody heard about problems with that specific sensor (because in the porsche part list i saw that an old part should not be use anymore)?

 

Thank you so much in advance for helping me out

[bacha]

Just load up a complete graph of the test drive whre you can see the drop of voltage to zero

Cooling Water Temp.pdf