Code Definition

P0093 — Fuel System Leak Detected Large Leak

System: Powertrain  |  Type: Generic (OBD-II Standard)  |  Make: Generic

About P0093

P0093 is a generic (obd-ii standard) powertrain diagnostic trouble code. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

Scanning & clearing: A generic OBD-II scan tool will usually read and clear powertrain (P) codes. For live data, freeze-frame capture, and bi-directional tests you may need a more capable scan tool that supports the vehicle's ECM protocol.

Because P0093 is a generic OBD-II code, its base definition is shared across manufacturers. The specific diagnostic steps, reference values, and repair procedures can vary by vehicle, and the TaT Diagnostic Assistant includes verified procedures submitted by working technicians.

Code Information

The P0093 code is set when the Engine Control Module (ECM) detects a large leak in the fuel system. This code indicates that there is a significant discrepancy between the fuel supplied and the fuel returned, suggesting a substantial leakage. Large fuel leaks can lead to a decrease in fuel pressure, potentially affecting engine performance, fuel efficiency, and can also pose safety risks.

Quick Facts