Randall, I used JB Weld on the tank, fixed it great
Yes, when I start the car, hot or cold, it goes to where it would normally go for about a second or two (pauses) then pops to the red. If the car was cold, the temp gauge would pause just above the blue, and then pop up to red. If the car is warm, it will pause at the middle, or running temp for a second or two, and then pop to the red.
False Coolant Level Warning
AFFECTED VEHICLE RANGE:
"CHECK COOLANT LEVEL" WARNING MESSAGE DISPLAYED
The vehicle may display the "Check Coolant Level" warning message even when the coolant level is visually within the correct range in the expansion tank. Incorrect specific gravity of the coolant mix can result in the "check coolant level" warning message being displayed.
VERIFY COOLANT SPECIFIC GRAVITY
If the customer complains of the above symptom, the specific gravity of the coolant MUST be checked prior to any other investigations or repair, such as the replacement of the expansion tank assembly or low coolant level sensor. The low coolant sensing system will not work correctly if the specific gravity of the coolant mixture is incorrect.
The specific gravity of a 50% anti-freeze solution at 20°C (68°F) is 1.075 (using a coolant specific gravity tester) and protects against freezing down to -36°C (-33°F).
DDW WARRANTY CLAIMS:
I think that the original issue may have been becasue the guys at the lube place filled my tank too full, and the expansion of teh fluid had nowhere to go. PLEASE CONFIRM OR DENY MY THOUGHTS ON THIS.
As far as the sensor, I will take a look at that, but when I was trying to figure this out, I added coolant, but ran out, so I added water. At this point, do I need a full draining of the system and re-fill becasue I have water in there?
Does it sound like I should, or could be able to drive it to the garage to be looked at, or should I have it towed?