P00FD
Battery B State of Charge Performance
State of charge of battery B (typically auxiliary or hybrid battery) shows performance fault — does not behave according to charging model.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: easy
Common causes
Ordered by how often each turns out to be the cause.
- Battery B aged or sulfatedCommon
Parts involved
- Battery B
- Charging System
P00FD 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.