How to solve 2001 VW Passat coolant light rpoblems?

I have a 2001 Volkswagon Passat 1.8 turbo, the coolant light will not stop coming on. We have replaced timeingbelt, thermostat, water pump, and the water outlet. The car drove for one day, went to crank it up this morning and the light came back on again. What can we do next?How to solve 2001 VW Passat coolant light rpoblems?If your coolant level is where it needs to be and you don't have any leaks! Try replacing the coolant bottle! the level sensors sometimes fail and will make your coolant light come on!How to solve 2001 VW Passat coolant light rpoblems?Most likely it has something to do with the water pump.. I had this problem a few months ago and my water pump had to be replaced "There is a leak" This may cost $500-700 to get replaced at the dealership.. I also had my timing belt and unfortunately a catalytic converter replaced also..