P0E72
Hybrid/EV Battery Internal Isolation Performance
The BMS detects degraded internal isolation between HV bus and battery enclosure. Insulation resistance below safety threshold.
The BMS detects degraded internal isolation between HV bus and battery enclosure. Insulation resistance below safety threshold.
Common causes
- high
Internal cell insulation aged
One of the most commonly reported causes for this code — check this first.
Typical part cost: $1100-8800
- medium
Internal moisture
A plausible cause — test and verify before replacing parts.
Typical part cost: $1100-8800
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First things to check
- 1Confirm the code with a scan tool and check for additional related codes.
- 2Inspect the relevant sensors, wiring, and connectors for damage or corrosion.
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Related codes
See related trouble codes
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Frequently asked questions
What does P0E72 mean?
P0E72 means "Hybrid/EV Battery Internal Isolation Performance". It is a generic OBD-II code that points to a fault in the hybrid / ev powertrain.
What are the most common causes of P0E72?
internal cell insulation aged; internal moisture; pack cell imbalance approaching service threshold — these are the most commonly reported causes. Verify with a proper diagnosis before replacing parts, or use the Wrenchify app for a vehicle-specific diagnosis.
Can I keep driving with this code?
This code can put the vehicle into limp or reduced-power mode. Avoid extended driving and have the vehicle diagnosed promptly. Use the Wrenchify app for a full diagnosis specific to your vehicle.
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