What is SPN 810 FMI 8
- SPN 810: Refers to a fault related to the fuel pressure sensor, indicating that the fuel pressure is either too high or too low.
- FMI 8: Indicates that the sensor is providing an invalid or incorrect signal to the ECM, meaning the ECM cannot get accurate fuel pressure data.
Together, SPN 810 FMI 8 signals an issue with the fuel pressure sensor, which could affect fuel regulation and engine performance.
Why It Happened
This fault code is commonly caused by:
- A malfunctioning or faulty fuel pressure sensor.
- Damaged or loose wiring connections between the sensor and ECM.
- A malfunctioning fuel pressure regulator.
- A faulty fuel pump that is not maintaining proper pressure.
- Blockages or leaks in the fuel system.
How to Resolve It
To resolve SPN 810 FMI 8:
- Inspect the fuel pressure sensor for faults and replace it if necessary.
- Check the fuel pressure regulator and pump for proper operation.
- Inspect the wiring and connectors for damage or loose connections.
- Test the fuel system for leaks or blockages.
- After repairs, clear the fault code and restart the engine to ensure the issue is resolved.
How to Avoid Before It Happens
To prevent SPN 810 FMI 8:
- Regularly inspect the fuel system, including the fuel pressure sensor and regulator.
- Check for leaks or blockages in the fuel lines.
- Use Clue to monitor fuel pressure data and get early alerts on irregularities.
