Powertrain
Definition only
Lights the check engine lamp
P2D9F: High Voltage System Voltage High
Standardized SAE J2012 code · P2Dxx codes
What does P2D9F mean?
The high-voltage system voltage is above the expected window. Regenerative braking overshoot or BMS regulation fault.
The code tells you which monitor failed, not which part is broken. Test before replacing parts.
Common causes
- High HV battery cells aged
- Medium BMS regulation outside calibration
Likelihood is a general estimate across vehicles; your make and model may differ.
Add your car to see reports of P2D9F on the same make and model first.
P2D9F in the community
Ask about P2D9FNo one has posted about P2D9F yet
Share your vehicle, the tool you used and what you tested — the first thread helps everyone who searches for this code.
Describe your P2D9F problem