Help with P0128 Fault

Hi all.

Sorry that my first post on the forums is a plea for help but ime getting a bit frustrated. My car has thrown up P0128 fault code (coolant temp below regulating temp) I have replaced both sensors on the block and bottom of the rad but no joy. Just wondering what the next coarse of action would be. Gauge on dash seems to come up nicley on cold start aswell so dont think it would be the thermostat but not 100% sure

Any help would be grately recieved
Thank
MK1

thats actualy exactly what the problem is, stuck open t-stat. just replace and bleed coolant and your fine. why didnt you research the problem before wasting money? thats a pretty easy problem to figure out and fix.....