Source-backed diagnostic reference

P0B22 EV diagnostic code

Battery contactor assembly failure, Battery Energy Control Module (BECM) failure

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 contactor assembly failure, Battery Energy Control Module (BECM) failure Source
GENERIC: Hybrid/EV Battery Pack Voltage Sense D Circuit Intermittent/Erratic Source
GENERIC: Generator Phase U Current Sensor Circuit Source

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