P0093
Fuel System Leak Detected - Large Leak
The ECU detected a large leak in the fuel system. Rail pressure cannot be maintained, often visible as fuel odor or visible drips.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: hard
Common causes
Ordered by how often each turns out to be the cause.
- Fuel line cracked or fitting looseCommon
- Injector O-ring failedPossible
Parts involved
- Fuel Lines
- Fuel Rail
- Injector Seals
P0093 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.