P0601 Internal Control Module Memory Check Sum Error
It could be a one-time thing, or it could be a problem with your PCM. I'd
disconnect the battery for about 15 minutes (this will clear the codes),
re-connect it, and see if the code comes back. If it does, you will need
further diagnostics by a qualified shop. This is strictly a
computer-related problem - nothing mechanical or electrical (aside from an
entire PCM) that you can change out to fix it, unfortunately.
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