Source-backed diagnostic reference

P0B30 EV diagnostic code

Battery Energy Control Module (BECM) failure, High voltage battery assembly failure, Wiring issue

Reference status: This page preserves source-backed code definitions for discovery. Manufacturer/model applicability, repair steps and safety conclusions are not treated as verified unless a manufacturer-specific verified report is available.

Reference definitions

AUDI: Battery Energy Control Module (BECM) failure, High voltage battery assembly failure, Wiring issue Source
GENERIC: Hybrid/EV Battery D Voltage Unstable Source
GENERIC: Hybrid/EV Battery D Voltage Unstable Source

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