FCar2000TA

iTrader: (7)

Like title says.... temp gauge works fine at startup, but then goes to zero pretty quickly. Turn the car off for a few seconds, turn the key on, and the gauge works. Crank the car, and the gauge goes to zero in a few seconds.

thoughts?

98CayenneT/A

Possibly the coolant temp sensor going bad. The cooling fans might also kick on high if the sensor is bad when your gauge reads 0

FCar2000TA

iTrader: (7)

I need to plug in with HP Tuners to see if the computer reads a temp.

unit

Temp sender is cheap and easy to replace. Might as well just put a new one on as yours is likely bad.

FCar2000TA

iTrader: (7)

Anyone have the part number for the temp sender?

98CayenneT/A

Auto parts stores will carry it

http://m.summitracing.com/parts/dfp-ts10076/none/images

tadams72

Might check your grounds as well they can be suspect in these scenarios.