P057F
Battery A State of Charge Performance
The battery monitor reports a State of Charge (SoC) value that does not match the rest-voltage and current pattern - typically a battery near end of life, sulfation, or a deep discharge that the SoC algorithm has not converged on.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: easy
Common causes
Ordered by how often each turns out to be the cause.
- Battery aged or sulfatedCommon
Parts involved
- Battery A
- Battery Monitor Module
P057F 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.