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Home >> Chevrolet >> 2012 >> Volt >> Repair and Diagnosis >> External Pages >> Different car >> Section 24 (Data Communications System) >> Diagnostic Information and Procedures >> DTC U1821 >> DTC Descriptor
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DTC Descriptor

WARNING: This page is about a different car, the 2011 Chevrolet Volt. However, it is still accessible from the selected car via links, so may be relevant.
DTC U1821 00

Lost Communication with 14V Power Module on Powertrain Expansion Communication Bus

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