Typically means a transducer is missing, unplugged, or faulty.
Seeing a code is step one. Fixing it requires logic. Follow this workflow: mercury smartcraft fault codes list
The best code is the one you never see.
typically flashes, and many SmartCraft displays allow you to press a "+" button Typically means a transducer is missing, unplugged, or
For the average boater, seeing a flashing warning light or an alphanumeric code on a Mercury VesselView, SmartCraft SC1000 gauge, or System Link display can be daunting. Without a , you are effectively blind. Follow this workflow: The best code is the
Mercury Marine’s system is a digital interface that connects your engine, gauges, and vessel systems (like fuel and trim) to provide real-time performance data and diagnostics. When a problem occurs, the system generates a specific SmartCraft Fault Code (often displayed as a 3- or 4-digit number on a SmartCraft gauge or VesselView display).
| Code | Description | Severity | Common Fixes | | :--- | :--- | :--- | :--- | | | O2 Sensor (Lambda) – Lean Condition | Medium (Yellow) | Vacuum leak, low fuel pressure, contaminated fuel. | | 146 | O2 Sensor (Lambda) – Rich Condition | Medium (Yellow) | Leaking injector, high fuel pressure, restricted air intake. | | 241 | Idle Air Control (IAC) – Circuit Fault | Low (Yellow) | Carbon buildup on IAC valve, failed IAC motor. | | 342 | Fuel Pump Driver – No Response | High (Red) | Failed fuel pump relay, blown fuse, dead fuel pump. | | 433-1 | High Pressure Fuel Pump – Insufficient Flow | High (Red) | Water in fuel, collapsed fuel line, failing pump. | | 522-1 | Fuel Rail Pressure – Too Low | High (Red) | Clogged VST filter, bad primer bulb, air in system. |