P0094 Fuel System Leak Detected Small Leak 2

OBD-II Code P0094: This code indicates that the Engine Control Module (ECM) has detected a small fuel leak in the fuel system. The ECM monitors the fuel pressure and if it drops below a certain threshold, it triggers this code.

p0094 – Fuel System Leak Detected Small Leak 2

Typical Severity: Moderate

Common Causes

P0094 – Fuel System Leak Detected Small Leak 2

Common Causes:

• Fuel cap not tightened properly
• Fuel filler neck damaged or leaking
• Fuel tank leaking
• Fuel line leaking
• Evaporative emissions (EVAP) system leak

 

Common Misdiagnosis

OBD2 Code: P0094

Description: Fuel System Leak Detected – Small Leak

Common Misdiagnosis: Replacing the fuel pump or injectors without checking for actual leaks in the fuel lines or connections.

OBD2 Code: Fuel System Leak Detected – Small Leak 2

Description: Indicates a small leak in the fuel system, potentially affecting performance and emissions.

Common Misdiagnosis: Assuming a faulty gas cap is the cause without inspecting other components such as hoses, seals, and connectors for leaks.

 

Common Diagnostic Steps

OBD2 Code: P0094 – Fuel System Leak Detected Small Leak

Description: This code indicates that the engine control module (ECM) has detected a small leak in the fuel system.

• Inspect all visible fuel lines and connections for signs of leakage or damage.
• Check the fuel cap to ensure it is properly sealed and not damaged.
• Use a smoke machine to detect any leaks in the fuel system, focusing on areas around fittings and joints.
• Examine the fuel injectors for leaks or faulty seals.
• Test the fuel pressure regulator for proper operation and check for leaks.
• Inspect the charcoal canister and associated hoses in the evaporative emission control system for leaks or blockages.
• If equipped, check for any stored codes related to EVAP system malfunctions that might indicate a related issue.