P0D90
Battery Charger Input Frequency Incorrect
The battery charger detects mains AC input frequency outside the calibrated window. EVSE frequency drift or wrong region selected.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: medium
Symptoms
- Charge status indicator shows fault
- Charging may not start or interrupts
- Slower-than-expected charge rate
Common causes
Ordered by how often each turns out to be the cause.
- Mains frequency outside specCommon
- Wrong region setting in chargerPossible
Parts involved
- Battery Charger Input
P0D90 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.