Check Engine Light, P0462

Bought a 2004 Altima with 100,000 miles for my son. His first car. Cleared
three of 5 codes. Replaced throttle body for code p0507. Can not do throttle
body relearning because my check engine light does not come on. Even
when the key is in the on position, all indicator lights come on except the
check the check engine light. I checked the gauge cluster for blown bulb but
there no bulb in that area. Tried replacing the cluster with used test. Still on
check engine light. I replaced the fuel pump for code p0462 but the code did
not clear . It came back after code clearing. Is this problem with my gauge
cluster or something else? What could be the problem code why p0462 is
not clearing after the fuel pump was replaced?