Contradiction with John 1:18
John 1:18 states that no man has seen God at any time, yet in 1 Kings 19:13, Elijah comes out to stand before the presence of the Lord.
John 1:18: No man hath seen God at any time; the only begotten Son, which is in the bosom of the Father, he hath declared [him].
Contradiction with Exodus 33:20
God tells Moses that no one can see His face and live, which contradicts Elijah's encounter with God's presence in 1 Kings 19:13.
Exodus 33:20: And he said, Thou canst not see my face: for there shall no man see me, and live.
Contradiction with Hebrews 1:1-2
These verses suggest that God has spoken through His Son in the last days, whereas in 1 Kings 19:13, God speaks to Elijah directly.
Hebrews 1:1-2: God, who at sundry times and in divers manners spake in time past unto the fathers by the prophets,