Diagnostic Trouble Code
P0AA6 — Hybrid Battery Voltage System — Isolation Fault
Hybrid Battery Voltage System — Isolation Fault
Definition
The hybrid control module has detected that the high-voltage battery system has lost electrical isolation from the vehicle chassis. This is a serious safety fault indicating that high voltage may be present on the vehicle body.
Common Causes
- Damaged high-voltage cable insulation
- Moisture intrusion into the battery pack or wiring
- Failed isolation monitoring sensor
- Coolant leak into the battery enclosure