What is SPN 625 FMI 9
- SPN 625: Refers to a fault related to the air intake temperature sensor, indicating that the sensor is not providing correct temperature readings of the intake air.
- FMI 9: Indicates that the signal from the intake air temperature sensor is out of range or invalid.
Together, SPN 625 FMI 9 signals that the air intake temperature sensor is malfunctioning, which could lead to improper air-fuel mixtures and engine performance issues.
Why It Happened
This fault code is typically caused by:
- A malfunctioning or failed intake air temperature sensor.
- Wiring issues between the sensor and ECM.
- Contamination or corrosion in the sensor or connectors.
- Extreme temperatures affecting sensor readings.
How to Resolve It
To resolve SPN 625 FMI 9:
- Inspect the intake air temperature sensor for damage or faults.
- Check the wiring and connectors for signs of wear, damage, or corrosion.
- Replace the faulty sensor if needed.
- Clear the fault code and restart the engine to verify the fix.
How to Avoid Before It Happens
To prevent SPN 625 FMI 9:
- Regularly inspect the air intake system and sensors.
- Ensure the air intake system is clean and free from debris or contamination.
- Use Clue to monitor intake temperature data in real-time and receive alerts for sensor issues.
