P2AF3
Starter Relay C Control Circuit Low
Starter relay C reports a control circuit low condition. Engine cranking can be inhibited or commanded unintentionally.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: easy
Common causes
Ordered by how often each turns out to be the cause.
- Control wire shorted to groundCommon
- Internal short in relay coilPossible
- Connector pins corroded - high contact resistanceLess likely
Parts involved
- Starter Relay C
- Wiring Harness
- ECM
P2AF3 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.