P0284
Cylinder 8 Contribution/Balance
Cylinder 8 contributes less power than expected.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: medium
Common causes
Ordered by how often each turns out to be the cause.
- Injector or ignition coil weak on cylinder 8Common
Parts involved
- Injector Cyl8
- Ignition Coil Cyl8
P0284 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.