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Home >> Chevrolet >> 1995 >> Chevy Van G20, 6.5 P >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 14 (Engine Controls - Tests W/Codes - 7.4L) >> Trouble Code Charts >> Code 51, Prom Error (Faulty Or Incorrect Prom)

Code 51, Prom Error (Faulty Or Incorrect Prom)

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

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