What is SPN 2917 FMI 19
- SPN 2917: Refers to a fault related to the diesel exhaust fluid (DEF) quality sensor, indicating that the DEF quality is not within the expected parameters.
- FMI 19: Indicates a failure in the DEF quality sensor signal, meaning the ECM is receiving invalid or inconsistent data from the sensor.
Together, SPN 2917 FMI 19 indicates an issue with the DEF quality sensor, which could affect the exhaust gas treatment system and lead to poor emissions control.
Why It Happened
This fault is usually caused by:
- A malfunctioning DEF quality sensor.
- Contamination or blockage in the DEF system.
- A failure in the ECM processing the sensor data.
- Incorrect DEF fluid, leading to inaccurate sensor readings.
How to Resolve It
To resolve SPN 2917 FMI 19:
- Inspect the DEF quality sensor and replace it if necessary.
- Check the DEF system for blockages or contamination.
- Ensure the DEF fluid is of the correct quality and free from contaminants.
- After repairs, clear the fault code and restart the engine to verify the fix.
How to Avoid Before It Happens
To prevent SPN 2917 FMI 19:
- Regularly inspect the DEF quality sensor and DEF system.
- Use the correct quality DEF fluid and avoid contamination.
- Monitor DEF system performance using Clue for early alerts on sensor issues.
