OBD-II code · Powertrain (generic)
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.
Is it safe to drive with P0093?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyFuel line cracked or fitting loose
- PossibleInjector O-ring failed
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–6 h
- Emissions test
- Likely to fail
- Parts involved
- Fuel Lines, Fuel Rail, Injector Seals
Related codes
- P0090Fuel Pressure Regulator A Control Circuit/Open
- P0091Fuel Pressure Regulator A Control Circuit Low
- P0092Fuel Pressure Regulator A Control Circuit High
- P0094Fuel System Leak Detected - Small Leak
- P0095Intake Air Temperature Sensor 2 Circuit Bank 1
- P0096Intake Air Temperature Sensor 2 Circuit Range/Performance Bank 1
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.