All 2st WRE125 ECU2 and Electric powervalve help please!

Hi All
I'm new here so please forgive me for any errors in posting here!

I am sincerely hoping someone can point me in the right direction on the following problems I am having with my WRE125 ?
I purchased the bike as a non runner but now have it running after replacing the stator so now turning my attention to the remaining faults but I am stumped!

1 -The digital dash shows ECU2 error and the oil light blinks - most info online points to the throttle position sensor but any advice would be appreciated to narrow down fault.
2 -The electric powervalve does not cycle open/close when i turn on the ignition - the powervalve itself is not seized (can move cables easily to manually open/close. The servo runs when I apply 12v to the motor so no issue there! Cant see any blown fuses and cleaned all connectors but no joy

Could the 2 errors be linked ? I purchased a 2nd hand ECU from E bay but same code appears on dash!
Thanks in advance