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Home >> Hyundai >> 1994 >> Scoupe LS, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes >> Diagnostic Tests >> Code 3128 - Heated Oxygen Sensor Failure >> Notes
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Code 3128 - Heated Oxygen Sensor Failure: Notes

NOTE: If after all testing procedures have been completed, system is still inoperative, substitute ECM with known good unit and retest.