What is CID 978 & How to Solve It?

What is CID 978:

cid 978 refers to a fault with the intake air pressure sensor circuit. incorrect readings cause improper fuel-air balance, affecting power and fuel economy.

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Why This Happens:

• faulty intake pressure sensor.
  
• blocked or dirty intake manifold.
  
• damaged wiring or connectors.
  
• short to voltage in signal wire.
  
• faulty ecm interpretation.
  
  

How to Fix It:

1. inspect intake manifold for soot buildup.
   
2. test sensor resistance and voltage range.
   
3. repair damaged harnesses.
   
4. replace the intake pressure sensor if faulty.
   
5. clear codes and confirm stable air pressure readings.

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How to Avoid It Before It Happens:

• regularly clean intake manifolds and sensors.
  
• ensure connectors remain moisture-free.
  
• monitor sensor output through diagnostics.
  
• clue’s equipment maintenance services track air system sensors to ensure accurate fuel-air ratios.