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Home >> Infiniti >> 2014 >> QX50 Base, AWD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Entertainment Systems >> Audio, Visual & Navigation System (BOSE Audio With Navigation) >> DTC/Circuit Diagnosis >> DTC U121B: Av Control Unit >> DTC Logic
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DTC Logic

DTC Display contents of CONSULT DTC detection condition Possible malfunction factor
U121B HDD COMM [U121B] AV control unit malfunction is detected. Replace the AV control unit if the malfunction occurs constantly.
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