Code Definition

P0094 — Fuel System Leak Detected Small Leak

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

About P0094

P0094 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 P0094 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 P0094 code indicates that the Engine Control Module (ECM) has detected a small leak in the fuel system. This diagnosis points to a minor discrepancy in the fuel system, where the amount of fuel being supplied does not match the amount returned or utilised, suggesting a minor leakage. Small fuel leaks can impact engine performance, fuel economy, and emissions, and they may lead to more significant issues if not addressed.

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