Soo...after sorting the thermostat a little over 2 weeks ago, was driving to work on Tuesday and guess what? Temp gauge didn't move from cold

The following day the engine warning light came on (this picture was after 11 miles of stop-start driving so should be nice and warm):

So I scanned for faults just to make sure nothing else was to blame and this is what was shown:

The sh!tty ECP thermostat barely lasted a fortnight!

I immediately got a Genuine one on order which I fitted earlier, I decided to drain and reuse the coolant as it was practically new:

Anyone spot the problem with the old thermostat?
