Check engine light and error code

Hi,

We just changed the rad in our car, 1998 cav, and afterwards the check engine light came on, with error code 112 and 113. Intake air codes, but not sure what they mean, or how to fix, though we did manage to clear 112, we can not get 113 to clear, even after reset it comes back.

Any ideas or things we can try would be helpful

Thanks.