What is SPN 3251 FMI 16:
SPN 3251 FMI 16 refers to a high voltage condition in the Fuel Rail Pressure Sensor Circuit. FMI 16 means that the voltage from the fuel rail pressure sensor is higher than expected, which can affect fuel pressure readings and lead to performance issues such as engine misfires or fuel injection problems.
Why This Happens:
- Faulty fuel rail pressure sensor.
- Shorted or damaged wiring in the sensor circuit.
- High voltage supply affecting the sensor’s output.
- Corroded or loose sensor connectors.
- ECM misinterpreting the sensor signal.
How to Fix It:
- Inspect the fuel rail pressure sensor for visible damage or malfunction.
- Test the sensor’s voltage and resistance to verify it is functioning within specification.
- Check wiring and connectors for visible damage or corrosion.
- Replace the faulty fuel rail pressure sensor if necessary.
- Inspect the fuel system for any issues, including low fuel pressure.
How to Avoid It Before It Happens:
- Regularly inspect the fuel rail pressure sensor and wiring.
- Ensure stable voltage supply to the sensor.
- Maintain clean and corrosion-free connectors.
- Perform diagnostic checks to monitor fuel pressure and detect sensor-related issues early.
- Clue’s Fuel Management services proactively monitor fuel systems to identify and prevent issues before they impact performance.
