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Infiniti Truck
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2010
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QX56 RWD V8-5.6L (VK56DE)
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Repair and Diagnosis
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A L L Diagnostic Trouble Codes ( DTC )
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Testing and Inspection
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U Code Charts
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U121B
U121B
U121B AV CONTROL UNIT
Description
Replace the AV control unit if this DTC is displayed.
AV Control Unit
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DTC Logic
