Charles Ellicott Commentary 1 Kings 22:43

"And he walked in all the way of Asa his father; He turned not aside from it, doing that which was right in the eyes of Jehovah: howbeit the high places were not taken away; the people still sacrificed and burnt incense in the high places." — 1 Kings 22:43 (ASV)

The high places were not taken away. This agrees with 2 Chronicles 20:33, and stands in apparent contradiction with 2 Chronicles 17:6: He took away the high places and groves out of Judah. Probably the key to the apparent discrepancy lies in the words “and groves” (Asherah). The high places taken away were those connected with the base Asherah worship; those which were simply unauthorized sanctuaries remained, at any rate in part.