I love how jehmin thinks people with no experience should be monkeying around with flash tools for their ecm. An ecm that is flagged as faulty has failed the checksum for the firmware code. As an aside, a seed code calculator runs around $200 so he's out $250 for the flashtool and seed code calculator and if it doesn't work he will still have to shell out $350 for a PCM.
OP, be smart and just replace the PCM. They are approx. $350 for a refurb. If you want to gamble for less buy a used one on ebay or pick one from a wrecking yard. Don't use your own car as a learning tool for something like this.