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Home >> Saturn >> 1993 >> SC2 Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - ECM/Pcm >> Self-Diagnostic System >> Information Flags >> Flag 63: Option Check Sum Error

Flag 63: Option Check Sum Error

Each time PCM is powered up, a comparison of tire size options is performed. Tire size and options must compare to valid combination options stored in EEPROM.

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