ok the code you are talking about can be created in several other ways, this in its self is a hurdle for ford should they decide not to replace something under waranty as it can be proven to be ""possible"" to create the same code from other problems. Yes ford can after reading what codes have been generated and what codes have been stored, but these codes can be generated in many other circumstances hence fi anyone were to dispute it in court they should win. Also the fact that the ecu can only store so many codes before it starts writting over what is allready stored ie not much memory