rabs throwing code after replacement

[stamina]

there was no codes being thrown before i replaced the valve as i had replaced with new abs module and rabs valve from junkyard. brakes worked alright but the rabs valve had a leak in one of the seals so i decided to replace it with a new one, after replacing and bleeding all 4 it threw a code 4, unhooked the battery and drained all power to ground, twice, and the code is still there I saw another forum it mentioned there was a button that has a rubber piece on the valve itself which i found , said it was very hard to press and it is but i don’t think i’ve been able to make it click, anymore info on this someone could shed some light on?

 

[Rangerdude]

That plastic piece is not a button but a hidden screw to the module assembly.