Code result
P0AA6
Hybrid Battery Voltage System Isolation Fault
High severity
What it means
The BMS isolation monitor detects insulation resistance between HV positive/negative bus and chassis ground below the safe threshold, indicating insulation failure somewhere in the HV system.
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
HV cable insulation damaged
highOne of the most commonly reported causes for this code — check this first.
Moisture intrusion in HV component
mediumA plausible cause — test and verify before replacing parts.
Aged HV component insulation
lowLess common, but worth ruling out after the more likely causes.
Related help
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