What is SPN 1705 FMI 31
- SPN 1705: Refers to a fault related to the turbocharger or supercharger system, indicating that the turbocharger's speed or performance is not within the expected range.
- FMI 31: Indicates a sensor malfunction or failure to send valid data, meaning the ECM is unable to receive proper performance data from the turbocharger or supercharger sensor.
Together, SPN 1705 FMI 31 signals a malfunction with the turbocharger system, which could affect engine power and performance.
Why It Happened
This fault code is caused by:
- A malfunctioning or damaged turbocharger sensor.
- Loose or damaged wiring between the turbocharger sensor and ECM.
- A failing turbocharger or related components, such as the actuator or valves.
- Contamination or corrosion affecting the turbocharger sensor.
How to Resolve It
To resolve SPN 1705 FMI 31:
- Inspect the turbocharger system and sensor for damage.
- Check the wiring and connections for signs of wear or corrosion.
- Test the turbocharger for proper performance.
- Replace the faulty sensor or turbocharger components if necessary.
- After repairs, clear the fault code and restart the engine.
How to Avoid Before It Happens
To prevent SPN 1705 FMI 31:
- Regularly inspect the turbocharger and related components for wear.
- Maintain the turbocharger system to ensure proper function.
- Use Clue to monitor turbocharger performance and receive early alerts on sensor issues.
