What is the deal with the whole fault code thing? According to my user manual a flashing code of 12 (flash pause flash flash) does NOT mean that everything is ok, it means that no serial data is being recevied.
dtc 12 is for engine, that page is airbags...
each module has it's own codes, you cannot read the SDM codes without a scan tool.
DTC 12 for ECU means all OK