What is SPN 1807 FMI 9 & How to Solve It?

What is SPN 1807 FMI 9:

SPN 1807 FMI 9 indicates a problem with the Exhaust Gas Recirculation (EGR) Valve Position Sensor. The FMI 9 specifically means that there is an abnormal reading from the sensor, which could result in improper control of the EGR valve. This can lead to poor engine performance, increased emissions, or fuel economy issues if not addressed.

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Why This Happens

• Faulty EGR valve position sensor.
  
• Damaged or shorted wiring in the sensor circuit.
  
• Corroded or loose connector at the sensor.
  
• EGR valve sticking or mechanical failure.
  
• Malfunction in the Engine Control Module (ECM) misinterpreting sensor data.
  
  

How to Fix It

1. Inspect the EGR valve position sensor and wiring for damage or corrosion.
   
2. Test the sensor for correct voltage output and compare with OEM specifications.
   
3. Inspect the EGR valve for sticking or carbon buildup and clean or replace it as necessary.
   
4. Check the connector for tightness and corrosion, ensuring a secure connection.
   
5. Replace the sensor if it is found to be faulty or inaccurate.
   
   

How to Avoid It Before It Happens

• Regularly clean and maintain the EGR valve to prevent buildup.
  
• Inspect the sensor and wiring during scheduled maintenance.
  
• Ensure the connectors are clean and free from moisture.
  
• Follow manufacturer recommendations for sensor replacement intervals.
  

Clue offers preventive maintenance services to monitor EGR system components, ensuring early detection and maintenance of issues before they cause performance problems.