“Now the rest of the acts of King Jehoahaz and everything that he did, including his power, are they not written in the Book of the Annals of the Kings of Israel? So King Jehoahaz slept with his ancestors. They buried him in Samaria. Then his son King Joash succeeded him.”
Once again, for further information check your lost “Book of the Annals of the Kings of Israel.” Like his predecessors, he died and was buried in Samaria. There is no indication of what kind of death he endured. Guess what? Hi son was named Joash, the same name as King Joash of Judah who ruled until 796 BCE.