P0094
Fuel System Leak Detected - Small Leak
A small fuel system leak detected by long-term pressure drop pattern. Often a slowly weeping injector or hairline crack in a fitting.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: hard
Common causes
Ordered by how often each turns out to be the cause.
- Injector seal slowly leakingCommon
Parts involved
- Fuel Lines
- Injector Seals
P0094 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.