What is CID 974 & How to Solve It?

What is CID 974:

cid 974 refers to a problem with the turbocharger speed sensor circuit. when this sensor fails, the ecm cannot accurately manage boost levels, causing poor power output or turbo lag.

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Why This Happens:

• faulty turbo speed sensor.
  
• damaged or shorted wiring harness.
  
• debris or carbon blocking the sensor.
  
• corroded connectors.
  
• ecm communication error.
  
  

How to Fix It:

1. inspect the turbo speed sensor for dirt or blockage.
   
2. test sensor voltage and frequency output.
   
3. check wiring and connectors for wear or corrosion.
   
4. replace the turbo speed sensor if readings are off.
   
5. ensure turbocharger spins freely without resistance.
   
   

How to Avoid It Before It Happens:

• perform turbo maintenance during regular servicing.
  
• keep the intake system clean.
  
• monitor turbo rpm data through diagnostics.
  
• clue’s construction fleet management software monitors turbo systems to maintain consistent power and reliability.