What is CID 1111 & How to Solve It?

What is CID 1111:

CID 1111 refers to a problem with the fuel pressure sensor circuit. Incorrect fuel pressure readings can cause engine stalling, poor acceleration, or fuel economy problems.

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Why This Happens:

• Faulty fuel pressure sensor.
  
• Shorted or damaged wiring.
  
• Low fuel pressure due to a malfunctioning fuel pump.
  
• Clogged fuel filters.
  
• ECM misinterpretation of pressure data.
  
  

How to Fix It:

1. Inspect the fuel pressure sensor for damage.
   
2. Test the sensor’s voltage and resistance.
   
3. Check the fuel system for low pressure or restrictions.
   
4. Replace the sensor if it continues to malfunction.
   
5. Clear the fault code and verify proper fuel pressure readings.
   
   

How to Avoid It Before It Happens:

• Regularly inspect fuel system components.
  
• Replace fuel filters on schedule.
  
• Monitor fuel pressure during diagnostics.
  
• Clue’s fuel management services track fuel pressure and prevent fuel delivery issues before they affect engine performance.