What is SPN 1347 FMI 7 & How to Solve It?

What is SPN 1347 FMI 7:

SPN 1347 FMI 7 refers to a problem with the Intake Air Temperature Sensor. FMI 7 indicates that the sensor is sending an out-of-range signal to the ECM, leading to inaccurate readings of intake air temperature and affecting engine performance.

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Why This Happens:

• Faulty intake air temperature sensor.
  
• Damaged or shorted wiring in the sensor circuit.
  
• Corroded or loose sensor connectors.
  
• Poor air intake due to contamination or blockages.
  
• ECM misinterpreting the sensor's data.
  
  

How to Fix It:

1. Inspect the intake air temperature sensor for physical damage or wear.
   
2. Test the sensor’s voltage and resistance to ensure they are within specifications.
   
3. Check the wiring and connectors for signs of damage or corrosion.
   
4. Replace the faulty intake air temperature sensor if necessary.
   
5. Inspect the air intake system for blockages or contamination.
   
   

How to Avoid It Before It Happens:

• Regularly inspect the intake air temperature sensor and wiring.
  
• Keep connectors clean and free from debris or moisture.
  
• Ensure the intake system is free of contaminants that could affect sensor accuracy.
  
• Perform routine diagnostic checks on sensor performance.
  
• Clue’s Equipment Maintenance services monitor the intake air system and sensors to prevent issues from affecting engine performance.