P2AF5
Starter Relay C Stuck On
Starter relay C reports a stuck on 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.
- Relay contacts welded closedCommon
- Output driver stuck onPossible
- Carbon or debris buildup preventing free movementLess likely
Parts involved
- Starter Relay C
- Wiring Harness
- ECM
P2AF5 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.