For those who (unfortunately) are able to get the 2E84 code, it means you need to replace the electric water pump (and thermostat).
For all others who somehow are going through some overheating engine problem, it might be simple a low coolant issue, or a leak somewhere, or else...
To answer the question of this thread: "How do i test the electric water pump?"
This youtube video saved me $600 (for now):
Not the best video out there, nor the most exciting to listen to, but man i learned something!
if you are ready to perform the above procedure, i recommend you have extra coolant available nearby to filll up if you see the coolant level is low in the expansion tank...
Leave the cap of the expansion tank out.
If the water pump works, it should pump coolant and circulate it...
This procedure will last over 10 mins and you cannot stop it... you just need to monitor it.
Good luck...
PS: sorry for reviving this thread
