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Home >> Hyundai >> 1993 >> Scoupe Base, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes >> Diagnostic Tests >> Code 3121 - Turbo Boost - Pressure Sensor Failure >> System Inspection

System Inspection

Inspect condition of vacuum hoses between intake manifold and ECM. Ensure there are no vacuum leaks. If vacuum hoses are okay, substitute ECM with known good unit and retest.

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