Automatic shut off code P0231 Changed fuel filter
It sounds like your theft control module is not reading your key. The ignition key tumbler has a 2 wire sensor that read a small diode on the key. I've seen the wires break and cause this type of problem. Unless you are familiar with how to disassemble the column and trace the wiring, it would be better to get an experience mechanic involved. Usually, if the tumbler has to be replaced, it may require reprogramming also.
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