My car stops when the temp gauge reach middle??

CHECK OIL LEVEL, SOUNDS LIKE A ROD KNOCK, CATASTROPHIC FAILURE

check wire is connected to temp sensor on the engine

faulty temp sensor

a car parts store can supply the sensor
for your model toyota corolla

i see answers to other questions here except the question asked about no heat in a 325 xi 2001 blower works great fluid is full no leaks,fuses are fine,get a lil heat while at a stand still but as soon as you drive cold air only temp on max 91, engine temp right in the middle takes about 8 mins for temp gauge to reach the middle can anyone help with this..PLEASE !!!!!!

Runing at the middle of the temp gauge is normal, If a vehicles temp gauge needle goes into the red zone on the gauge or into the hot zone as far as the needle will go .then you start worrying. Middle position is (NormaL for most (Vehicles) You have nothing to worry about.

sounds like the thermostat has gone,you stop and the fan starts to keep the temp down to normal.

I would look for debris around the thermostat or maybe flush and fill the coolant system to try to make it work more efficiently.

Probably not. Check fans to make sure they are coming on when the engine reaches normal temp. If not, check fuse first, then relay

Don't run the car without a thermostat. It helps the car to reach operating temps quickly. also helps burn off blow by gasses by keeping the temps up and steady. check your radiator level once driving a few miles. Their may have been some air pockets that purged and need to be replaced with additional fluid.

the trans will not allow overdrive until coolant reaches roughly 180 degrees, if the guage shows cool and the trans is not upshifting, or downshifts to third while driving. the problem is either a sticking (or missing) thermostat. follow the lower radiator hose to the engine and find the three 12mm nuts, remove these to get to it. a new toyota t-stat will have a little bleed valve on its face. position it upwards when installing. hope this is helpful.
P.S. Happy New Year

The Temp gauge should read in the middle of the gauge at operating temperature. This is normal. The radiator fan should come on after idling (not driving) for 20 minutes. The fan should also come on when you turn on the AC. Are you experiencing overheat problems?
Please reply if you have overheating issues.