P2AF9
Starter Relay D Control Circuit High
Starter relay D reports a control circuit high 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 B+Common
- Open relay coilPossible
- Connector pins corroded - high contact resistanceLess likely
Parts involved
- Starter Relay D
- Wiring Harness
- ECM
P2AF9 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.