From my point of view Passive Code should work like Firearms skills or Find weakness.
Means you activate it, it stays for x seconds and has a 90 sec cooldown timer.
At the moment you can activate Passive Code and it stays active all the time:

This means i can nearly double my healing only by activating passive code all the time!!
And another thing I mentioned using passive code: It does not stack with Ugrade Master Upgrade, which does not boost Healing (only Viral damage)!
PS.: yes i ccr'ed all these things as well :smileyhappy:
Means you activate it, it stays for x seconds and has a 90 sec cooldown timer.
At the moment you can activate Passive Code and it stays active all the time:

This means i can nearly double my healing only by activating passive code all the time!!
And another thing I mentioned using passive code: It does not stack with Ugrade Master Upgrade, which does not boost Healing (only Viral damage)!
PS.: yes i ccr'ed all these things as well :smileyhappy:
