when key is turned on ,the 4wheel drive lite is on , but the switch is in 2wheel on 2004 Toyota 4Runner

the lite will go out after switching to 4wheel then back to 2wheel -seems to shift from 2wheel to 4wheel - but no matter any time the key is off and on again it is always in 4wheel mode dont notice any codes coming up

Asked by for the 2004 Toyota 4Runner