What is SPN 3216 FMI 13 & How to Solve It?

What is SPN 3216 FMI 13:

SPN 3216 FMI 13 refers to a low voltage condition in the Fuel Temperature Sensor Circuit. This fault suggests that the ECM is receiving a signal that is below the expected voltage, which could result in incorrect fuel temperature readings and affect fuel efficiency.

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Why This Happens:

• Faulty fuel temperature sensor.
  
• Shorted or damaged wiring in the sensor circuit.
  
• Loose or corroded sensor connectors.
  
• Incorrect voltage supply affecting sensor readings.
  
• ECM misinterpreting the sensor signal.
  
  

How to Fix It:

1. Inspect the fuel temperature sensor for damage or malfunction.
   
2. Test the sensor’s voltage and resistance to ensure it’s within specifications.
   
3. Check wiring and connectors for visible damage, corrosion, or loose connections.
   
4. Replace the faulty sensor if necessary.
   
5. Verify proper voltage supply to the sensor.
   
   

How to Avoid It Before It Happens:

• Regularly inspect the fuel temperature sensor and its wiring.
  
• Keep connectors clean and free from corrosion.
  
• Ensure stable voltage supply to the sensor.
  
• Perform routine diagnostic checks on the fuel system.
  
• Clue’s Fuel Management services help monitor fuel system components and prevent sensor-related issues from affecting engine performance.