OBD
P0D28
Battery Charger Input Voltage Too High
What it means
P0D28 means Battery Charger Input Voltage Too High.
Check these first
- High AC input voltage to the charger
- A charger that is not regulating input
- A wiring fault in the charger input circuit
- A faulty charger input voltage reading
- A charging control module fault
What to do next
- Read battery charger input voltage on a scan tool
- Measure the AC input voltage at the charger
- Inspect the charger input wiring
- Verify the charger input voltage reading with a meter
- Service the charger once isolated
- Clear the code and retest
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Updated
Generic SAE J2012 definition. Last updated 2026-10-10.