Code result
P0B29
Hybrid/EV Battery B Voltage Low
High severity
What it means
The voltage of HV battery B is below the expected window. Cell-group depleted, deeply aged, or sense fault.
Is it safe to drive?
No — stop driving
This code can put the vehicle into limp or reduced-power mode. Avoid extended driving and have the vehicle diagnosed promptly.
Most likely causes
Cells in group aged - capacity reduced
highOne of the most commonly reported causes for this code — check this first.
Deep discharge event
mediumA plausible cause — test and verify before replacing parts.
Pack cell imbalance approaching service threshold
lowLess common, but worth ruling out after the more likely causes.
Related help
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