Detect a Trap
Senses. Look, hear, feel, or smell for evidence of a trap. See examples. Usually a Wisdom (Perception) check against the DC specified in the trap’s description will be required. (82)
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Moving at a fast pace can give you disadvantage.
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Proficiency with certain tools can sometimes help.
Logic. Sometimes your senses are not enough – an Intelligence (Investigation) check instead of, or in addition to, a Perception check is necessary. (81) See examples.
Lore. A lore-based Intelligence check might help in certain situations. (81) See examples.
Magic Traps. Magic traps are usually more difficult to detect than non-magic traps. Use an Intelligence (Arcana) check to detect one. See examples.
A Wisdom (Perception) check will work on some magical device traps. See examples. An an Intelligence (Investigation) check will work on most spell traps. See examples.