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

System Inspection

Determine if vehicle is producing high emissions. High emissions can be caused by faulty HO2S, injector, coolant temperature sensor, vacuum leak and/or malfunctioning airflow sensor.

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