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Home >> Buick >> 1986 >> Riviera Base >> Repair and Diagnosis >> Engine Performance >> System >> BCM System, Part I >> ECM Trouble Code Charts >> Code EO51, Prom Error

Code EO51, Prom Error

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Check that all pins are fully inserted in the socket. If okay, replace PROM, clear memory, and recheck. If Code 51 reappears, replace ECM.