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Home >> Geo >> 1990 >> Storm Base, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes >> Self-Diagnostic System >> Clearing Codes
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Clearing Codes

Turn ignition switch to OFF position. Remove 30-amp main fuse from underhood fuse/relay block or disconnect negative battery cable for at least 30 seconds. ECM trouble code memory is now clear. Connect negative battery cable.