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Home >> Chevrolet >> 2007 >> Chevy Express G2500, Van Cargo, 6.6 6 >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 15 (Engine Control System & Fuel System - 6.6L (LLY) - DTC P0401 To DTC P2510) >> DTC P0642 or P0643 >> DTC Descriptors

DTC Descriptors

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DTC P0642

5-Volt Reference 1 Circuit Low Voltage

DTC P0643

5-Volt Reference 1 Circuit High Voltage

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