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Home >> Oldsmobile >> 1990 >> Custom Cruiser >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - 5.0L & 5.7L TBI >> Diagnostic Codes >> Code 51, Faulty Prom/Mem-Cal

Code 51, Faulty Prom/Mem-Cal

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

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