What is CID 1055 & How to Solve It?

What is CID 1055:

CID 1055 indicates a problem with the turbocharger actuator control circuit. The ECM detects irregular movement or signal response from the actuator that controls turbo boost levels.

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Why This Happens:

• Faulty turbo actuator motor.
  
• Wiring damage or short circuits.
  
• Vacuum or pressure control issues.
  
• Corroded electrical connectors.
  
• ECM communication failure.
  
  

How to Fix It:

1. Inspect the actuator and vacuum lines for leaks or damage.
   
2. Test actuator movement using diagnostic tools.
   
3. Verify voltage and ground at the actuator connector.
   
4. Replace or clean the actuator if sticking.
   
5. Clear codes and perform a boost test to confirm proper function.
   
   

How to Avoid It Before It Happens:

• Regularly service the turbocharger and actuator components.
  
• Keep connectors dry and free of corrosion.
  
• Inspect vacuum lines for leaks.‍
• Clue’s equipment maintenance services monitor turbo systems for early failure detection.