What is CID 1112 & How to Solve It?

What is CID 1112:

CID 1112 refers to a fault in the fuel rail pressure sensor circuit. This fault can lead to improper fuel injection and poor engine performance.

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Why This Happens:

• Faulty fuel rail pressure sensor.
  
• Shorted or damaged wiring in the circuit.
  
• Corroded or loose connectors.
  
• Fuel pump failure or fuel line restriction.
  
• ECM misreading fuel pressure data.
  
  

How to Fix It:

1. Inspect the fuel rail pressure sensor and wiring.
   
2. Test the sensor’s output voltage and resistance.
   
3. Check the fuel system for low pressure or blockages.
   
4. Replace the faulty sensor or damaged wiring.
   
5. Clear the fault code and verify fuel delivery performance.
   
   

How to Avoid It Before It Happens:

• Regularly monitor fuel pressure.
  
• Clean connectors and inspect wiring during service.
  
• Replace fuel filters as needed.
  
• Clue’s fuel management services track fuel rail pressure and help prevent sensor-related issues before they cause performance problems.