My 93 trans am is getting a c1211 code. Does anyone know what this code means? I am coming up with 3 different responses online. Im trying to diagnose the abs inop light being on. Does anyone also know why this code isnt showing up in the service manual for the car? This code also seems to be for a obd 2 system but my 93 trans am has a obd 1 system on it so how is it possible for me to be getting a code for an obd 2 system???????