Code result
P0E72
Hybrid/EV Battery Internal Isolation Performance
High severity
What it means
The BMS detects degraded internal isolation between HV bus and battery enclosure. Insulation resistance below safety threshold.
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
Internal cell insulation aged
highOne of the most commonly reported causes for this code — check this first.
Internal moisture
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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