What is CID 654 & How to Solve It?

What is CID 654:

CID 654 refers to a problem with the vehicle’s fuel system, particularly with the fuel pressure sensor. The ECM detects an abnormal signal from the sensor, which can lead to incorrect fuel pressure and cause engine performance issues.

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Why This Happens:

• Faulty fuel pressure sensor.
  
• Shorted or damaged wiring in the sensor circuit.
  
• Loose or corroded sensor connectors.
  
• Low fuel pressure due to malfunctioning fuel pump.
  
• ECM failure to process sensor data.
  
  

How to Fix It:

1. Inspect the fuel pressure sensor and wiring for visible damage or malfunction.
   
2. Test the sensor’s voltage and resistance to verify it is functioning correctly.
   
3. Check connectors for tightness and cleanliness.
   
4. Replace the faulty fuel pressure sensor if necessary.
   
5. Inspect the fuel system for low pressure or malfunctioning fuel pumps.
   
   

How to Avoid It Before It Happens:

• Regularly inspect the fuel pressure sensor and wiring.
  
• Perform routine fuel system maintenance.
  
• Keep connectors clean and free from corrosion.
  
• Perform diagnostic checks to monitor fuel pressure.
  
• Clue’s fuel management services track fuel pressure systems to detect issues before they affect engine operation.