Airbag light came on after replacing radiator

[bj70alex]

Tried resetting airbag sensor a few times (DTC) and it didn't help. Asked a friend (his used to work at Toyota) and came out with Code 22 .
What should I do next?????

 

[bj70alex]

I tried resetting it using the procedure (DTC) but i didn't help. I asked a friend (he used to work at Toyota Service) and came out with Code 22.
What should I do next?????? Thanks