“In the fiftieth year of King Azariah of Judah, King Pekahiah son of King Menahem began to reign over Israel in Samaria. He reigned two years. He did what was evil in the sight of Yahweh. He did not turn away from the sins of King Jeroboam son of Nebat, which caused Israel to sin.”
Near the end of the reign of King Azariah in Judah, King Pekahiah, the son of King Menahem began his rule, but it only lasted 2 years. That is an indication that there may be some foul play here. He, of course, followed in the evil ways of King Jeroboam I, causing Israel to sin.