P26F2
Starter Relay B Stuck On
The second starter relay stays closed when commanded off. Starter motor B remains engaged after the engine is running, which can destroy the starter pinion or ring gear.
- 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 shut by inrush currentCommon
- ECU output driver stuck onPossible
- Carbon or debris buildup preventing free movementLess likely
Parts involved
- Starter Relay B
- Starter Motor B
P26F2 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.