OBD
P2D9F
High Voltage System Voltage High
What it means
P2D9F means High Voltage System Voltage High.
Check these first
- An overcharged high voltage battery pack
- A failed DC/DC converter regulation
- A faulty battery pack voltage sensor
- A charging module overcharge fault
- A high voltage system isolation fault
What to do next
- Read high voltage pack voltage on a scan tool
- Check the DC/DC converter output
- Test the battery pack voltage sensor
- Scan the charger for overcharge codes
- Repair the overvoltage source before driving
- Clear the code and retest
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Updated
Generic SAE J2012 definition. Last updated 2026-10-10.