DTC P0602: Pcm Programming Error: Notes
WARNING: This page is about a different car, the 2003 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
If "PCM CONFIGURATION" is successful, PCM stored DTC P0602 and illuminates MIL (System is normal). Clear DTC P0602 using WDS or equivalent after "PCM CONFIGURATION". MIL goes off after three drive cycles with no failure (DTCs remain in PCM).