P0B30Battery Energy Control Module (BECM) failure, High voltage battery assembly failure, Wiring issue
⚙️ Powertrain (Motor y Transmisión)🏭 Specific to Audi
The voltage measurement of HV battery D fluctuates beyond the expected window. Loose connection or unstable cell.
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Can I keep driving? With caution
You can drive to the shop, but do not postpone the repair. The problem may worsen and damage other components.
Sistema Afectado
Sistema Híbrido / EV · Batería HV y motor eléctrico
Pertenece al sistema de alto voltaje: batería de tracción, inversor o motor eléctrico.
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Symptoms You Will Notice
What you may observe when this code appears
- EV/hybrid system warning light on
- Reduced power output or limp mode
- Charging may fail or be slowed
- Reduced electric range
Possible Causes
The components or conditions that trigger this code
- 1Loose busbar or terminal connection
- 2Cell with unstable internal resistance
- 3Pack cell imbalance approaching service threshold
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Estimated Cost
Approximate range in USD (varies by region and shop)
$500—$8,000
HV electric system
* Diagnosis only: $50–$150
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Quick Info
CodeP0B30
CategoryMotor (P)
ManufacturerAudi
SeverityModerada
Symptoms4
Causes3
Solution steps0
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