What is CID 1021 & How to Solve It?

What is CID 1021:

cid 1021 refers to a problem with the intake air pressure sensor circuit. when this sensor fails, the ecm cannot accurately measure air pressure in the intake, which can cause incorrect fuel-air mixture ratios and affect engine performance.

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Why This Happens:

• faulty intake air pressure sensor.
  
• blocked or damaged intake system components.
  
• shorted or damaged wiring.
  
• loose or corroded connectors.
  
• ecm misinterpretation of sensor data.
  
  

How to Fix It:

1. inspect the intake air pressure sensor for damage or contamination.
   
2. test the sensor’s output voltage and resistance.
   
3. clean or replace the intake air filter and sensor.
   
4. replace damaged wiring or connectors if needed.
   
5. reset the ecm and verify proper air pressure readings.
   
   

How to Avoid It Before It Happens:

• clean the intake air system regularly.
  
• perform diagnostic checks on air pressure sensors.
  
• replace filters during scheduled maintenance.
  
• clue’s equipment maintenance services track air pressure sensors to optimize fuel economy and engine performance.