What is SPN 520268 FMI 16 & How to Solve It?

What is SPN 520268 FMI 16:

SPN 520268 FMI 16 refers to a high voltage condition in the Fuel Injector Control Module (FICM) circuit. This fault means that the FICM is receiving an unusually high voltage, which can affect the fuel injection timing and engine performance, potentially causing inefficient fuel delivery and poor fuel economy.

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Why This Happens:

• Faulty Fuel Injector Control Module (FICM).
  
• Shorted or damaged wiring in the FICM circuit.
  
• High voltage supply issues affecting the FICM.
  
• Loose or corroded connectors in the FICM circuit.
  
• ECM failure to interpret the signal correctly.
  
  

How to Fix It:

1. Inspect the Fuel Injector Control Module (FICM) and its wiring for visible damage.
   
2. Test the FICM’s voltage and ensure it is within specification.
   
3. Check connectors for corrosion or loose connections.
   
4. Replace the faulty FICM if it is malfunctioning.
   
5. Verify the ECM’s communication with the FICM and sensor systems.
   
   

How to Avoid It Before It Happens:

• Regularly inspect the FICM and wiring for any signs of wear or damage.
  
• Keep connectors clean and free from moisture or corrosion.
  
• Ensure stable power supply to the FICM and related components.
  
• Perform diagnostic checks to monitor FICM voltage and performance.
  
• Clue’s Fuel Management services provide real-time monitoring of fuel injection systems to prevent performance issues.