Detect Vulnerability is a Sentinel precept that allows the Helios Sentinel to reveal weakspots on enemies that have had previously completed Codex scans. Hitting an enemy in the highlighted weakspot will apply a damage multiplier.


Rank Damage Multiplier Cost
0 +150% 6
1 +175% 7
2 +200% 8
3 +225% 9
4 +250% 10
5 +275% 11


  • This mod can be acquired from Cephalon Simaris for ReputationLargeBlack75,000.
  • Initially this mod was not tradeable, however it is now able to be acquired via Trading provided you have a duplicate of the mod (similar to Sanctuary).


  • Enemies must have a completed codex entry prior to entering the mission to be eligible to be marked with a weakspot.
  • Marking an enemy with a weakspot does not consume a Codex Scanner charge and it is not necessary to have Investigator equipped for Detect Vulnerability to function.
  • The Sentinel will randomly select a single enemy within 30 meters to mark.
  • The mark appears as a highlight in the Sentinel's energy color, visible to all members of the Sentinel owner's squad on a randomly selected enemy body part.
  • The mark has a 'fade-in' time of approximately 0.5 seconds and a duration of 9.5 seconds at max rank.
  • The mark will remain for the duration even if the target moves further than 30 meters away after being marked, unless the target is killed.
  • Selecting a target to mark takes the Sentinel approximately 2 seconds from when an enemy comes within range or after the previous mark expires.
  • The damage increase stacks multiplicatively with body part multipliers.
  • Although the precept functions similarly to Banshee's Sonar ability, the highlighted weakspot is smaller and will not trigger Resonance.


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