P0562
System Voltage Low
Battery / charging system voltage seen by the ECU has dropped below the lower threshold (typically around 10.5 V). Modern ECUs are sensitive to under-voltage and may set this code briefly during cranking on a weak battery.
- 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 weakCommon
- Alternator underchargingPossible
- Corroded battery terminals or ground strapPossible
Parts involved
- Battery
- Alternator
- Alternator Belt
- Battery Cables
P0562 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.