2001 chevy s10

Question

po401 code pre air injection malfunction what should I ok for?

Answer 1

P0401 Exhaust gas recirculation flow insufficient detected

This code condition is for the ER system , where the EGR is non operational, If you meant P410 this would be for the secondary air injection system, what you should look for is with the secondary air injection relay.

 Here the location of the secondary air injection relay, what listed as number 3 is the secondary air relay,