When trying to dump Daytona USA championship circuit edition, with previous test version I got this error. The disc is scratch free, and dumped without c2 matches database entry.
Creating img(LBA) 10375/223372 SCSI bus status codes:02-CHECK_CONDITION [F:CheckC2Error][L:231] Sense data, Key:Asc:Ascq:03:02:83(MEDIUM_ERROR. VENDER UNIQUE ERROR) LBA 10379 Read error [L:237] Couldn't check C2 error
Maybe related to what pablo said about c2 offset correction.