i have a 92 accord sedan that flashes a code 12 using the chk engine light (this code means the egr lift valve) but at the same time my srs light is flashing a code 21.. i cant find anywhere what this means. i get these codes by installing a jumper wire with the key on..the chk eng flashes code 12 continuous but the srs only flashes code 21 four times then stays off..it never comes on while running. does anyone know what this means?

 

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