Overheating is caused by three things.
1. Lack/quality of coolant indicating leak.
2. Failed cooling fans which would likely set an emissions DTC and put an engine light on. Or
3. An internal engine head gasket leak causing combustion heat to go into the cooling system.
If your cooling system has been recently worked on, then it just may need to be bled. If an air bubble works its way around the cooling system then it causes overheating. Restricted cooling systems is less common and leaks are more common.
I would take your vehicle to a mechanic to verify source of problem. Since youre running so hot youre using more fuel and possibly damaging engine seals. Hope this helps!
- B.