What is FMI 19 & How to Solve It?

What is FMI 19:

FMI 19 refers to sensor circuit open. The ECM detects that there is an open circuit in the sensor’s wiring, meaning the sensor is not transmitting a signal to the ECM, causing the system to malfunction.

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Why This Happens:

• Open or broken wiring in the sensor circuit.
  
• Loose or disconnected connectors.
  
• Faulty sensor.
  
• Corroded connectors or terminals.
  
• ECM failure to process data from the sensor.
  
  

How to Fix It:

1. Inspect the sensor’s wiring for visible breaks or disconnects.
   
2. Test the circuit for continuity and ensure the wiring is intact.
   
3. Reconnect any loose connectors or terminals.
   
4. Replace the faulty sensor if necessary.
   
5. Verify that the ECM is receiving the correct signal from the sensor.
   
   

How to Avoid It Before It Happens:

• Regularly inspect wiring and connectors.
  
• Perform routine checks on sensor circuits for damage.
  
• Ensure connectors are securely fastened and clean.
  
• Clue’s fleet management services track circuit health and help prevent open circuit issues from disrupting system operations.