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Home >> Geo >> 1990 >> Prizm Base, 4D Hatchback, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes >> Self-Diagnostic System >> Clearing Codes

Clearing Codes

Turn ignition switch to OFF position. Remove STOP fuse from fuse block or negative battery terminal for at least 30 seconds. ECM trouble code memory is now clear.

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