P02A6
Cylinder 4 - Fuel Trim at Max Limit
Per-cylinder fuel trim on cylinder 4 has reached its maximum correction limit. Cylinder running too lean structurally.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: medium
Common causes
Ordered by how often each turns out to be the cause.
- Injector clogged on cylinder 4Common
Parts involved
- Injector Cyl4
P02A6 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.