Contradiction with 2 Kings 16:6
States that Rezin, king of Syria, recovered Elath for Syria, whereas 2 Chronicles 28:18 mentions the Philistines invading the cities in the low country and the south of Judah, presenting different invaders affecting Judah.
2 Kings 16:6: At that time Rezin king of Syria recovered Elath to Syria, and drave the Jews from Elath: and the Syrians came to Elath, and dwelt there unto this day. [from Elath: Heb. from Eloth]
Contradiction with 2 Chronicles 28:6
Describes Pekah, son of Remaliah, slaying 120,000 in Judah, whereas 2 Chronicles 28:18 ascribes the devastation to the Philistines, not Pekah.
2 Chronicles 28:6: For Pekah the son of Remaliah slew in Judah an hundred and twenty thousand in one day, [which were] all valiant men; because they had forsaken the LORD God of their fathers. [valiant...: Heb. sons of valour]