Hi Guys I'm a new member here @ Briskoda 

I have a Skoda Octavia mk3 2015 2.0 tdi 150bhp

The problem i have experienced is coolant loss I've had the skoda pressure tested which was fine then had it checked for any visible leaks there won't any so had the water pump changed which had failed i thought problem solved but no the problem still existed after doing 2,000k miles later the coolant warning light appears on the instrument cluster i don't know what to do I feel like ripping my hair out 🥺😭 please can you help me.

This is one thread of many.  Search for coolant loss in this forum.

 

As @ordsas mentioned; it will probably be a weeping water/coolant pump which is a known weakness on all early MK3's.  Check on the floor around this area.

If that's not looking like an issue, then its the cap to the expansion tank (they also fail) leaking out hot coolant. 

 

Get the waterpump changed out and do the timing belt whilst you are there (sorry, several hundred euros worth of work).

@varaderoguyI have had the water pump and timing belt changed couldn't see any leaks on the floor will try the expansion cap hopefully this will cure it.