Anybody with a tip, in willing to try

I'll send you some instructions monday.
I the meantime please find a 10k ohm resistor.

Nice, keep us posted. A write up of this fix after its done would help a lot of people on here. Keep up the good work fellas.

Something like this?

Robot Check

That should work. 10k ohms is approximately 70d. What I don't know is if you will get a code due to the temperature value never changing.

I did find a smaller 10k ohm thermistor temp sensor if you want to test it.

Would it go inside the tank? Or would I just splice a wire and leave it outside the tank? I cannot get the top off the tank it refuses to budge

And yea I would try the thermistor

The sensor could be submerged but I would mount/strap/tape it to the side of the tank for testing purposes. I would also try to insulate it to limit the affects of the surrounding engine compartment temperature.

Note: This sensor is a two wire sensor and will NOT work in three wire applications. it's a 10k ntc type III thermistor (see chart).

http://www.veris.com/docs/support/fa...Z202030-0N.pdf

The things I don't know:

If affected by engine bay temp, is there a comparison of this temperature and the ambient temp (plausibility)?

There is a heater in the tank. Will mounting the sensor on the outside of the tank hinder heater operation due to engine bay temp?

Check operating temp ranges of ANY insulation you use before testing.

DISCLAIMER: I have no knowledge of the specifications of the factory installed sensor and will not be responsible for any damage that might occur using this sensor. Use at your own risk.

If you are still interested in the sensor, PM your shipping info.

The thermistor will be the best option and i thank you for taking time to find it and share it here. You can also post this in the thread for the active tank or make another thread after it was tested.
If it were me, I would stick it to the outside of the tank and put some insulation on top of it as you mentioned. I would stick it to the right side (pointing to the side of the bumper) and call it a day.

Hopefully this will work. I agree with the mounting location. That should be close enough for guess work as my father would say. :thumbup: