You can sense nearby traps even if not actively searching for them.
Prerequisites: Search 25 ranks, Spot 25 ranks, trapfinding class ability.
Benefit: If the character passes within 5 feet of a trap, he or she is entitled to a Search check to notice it as if the character was actively looking for it.
Source: Standard Reference Document under Open Game License v1.0a, which updated this feat originally published in the Epic Level Handbook, page 68.