Mercury SmartCraft fault codes provide critical diagnostic information about your engine's health, ranging from minor sensor glitches to severe mechanical failures. These codes are typically displayed on your SmartCraft gauges or can be retrieved using a diagnostic scanner.
| Fault Code | Description | Typical Cause / Action | | :--- | :--- | :--- | | | Fuel Pressure Sensor | Pressure out of range. Indicates failing low-pressure fuel pump or clogged fuel filter. | | Code 12 | Manifold Absolute Pressure (MAP) | Vacuum leak or faulty sensor. Engine will run rich or lean. | | Code 13 | Oxygen (O2) Sensor | (Common on later 4-stroke models) Sensor not switching. Indicates lean/rich condition or bad sensor. | | Code 14 | Intake Air Temperature (IAT) | Open or short. Engine may idle rough due to incorrect fuel trimming. | | Code 15 | High Fuel Pressure | Faulty high-pressure pump (Verado) or regulator issue. | mercury smartcraft fault codes list
Below is a categorized list of common Mercury SmartCraft fault codes, their descriptions, and typical causes. Note that specific code availability may vary based on the engine model (Verado, OptiMax, FourStroke, MerCruiser) and the SmartCraft gateway version. Indicates failing low-pressure fuel pump or clogged fuel
Your SmartCraft system provides different ways to access these codes depending on your helm setup: Mercury Smartcraft Gauges Operation | | Code 13 | Oxygen (O2) Sensor