According to the author of the book of 1 Kings, Jehoshaphat was a strong and brave king who did many important things. If you want to know more about his adventures and battles, you can find them written in another book about the kings of Judah.
1 Kings 22:46: Now the rest of the acts of Jehoshaphat, and his might that he shewed, and how he warred, [are] they not written in the book of the chronicles of the kings of Judah?
This verse states that the sodomites were expelled during the reign of Asa, contradicting the claim in 1 Kings 22:46 that Jehoshaphat removed them.
1 Kings 15:12: And he took away the sodomites out of the land, and removed all the idols that his fathers had made.