What is CID 157 & How to Solve It?

What is CID 157:

CID 157 refers to an issue with the exhaust gas temperature (EGT) sensor. The ECM detects an abnormal reading or signal from the sensor, which can lead to increased emissions or decreased fuel efficiency.

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Why This Happens:

• Faulty exhaust gas temperature sensor.
  
• Shorted or damaged wiring in the sensor circuit.
  
• Loose or corroded sensor connectors.
  
• Malfunctioning exhaust system components.
  
• ECM failure to interpret the data correctly.
  
  

How to Fix It:

1. Inspect the exhaust gas temperature sensor for damage or malfunction.
   
2. Test the sensor’s voltage and resistance to ensure it operates correctly.
   
3. Check wiring and connectors for visible damage or corrosion.
   
4. Replace the faulty sensor if necessary.
   
5. Inspect the exhaust system for blockages or damage.
   
   

How to Avoid It Before It Happens:

• Regularly inspect the exhaust gas temperature sensor and wiring.
  
• Perform routine exhaust system maintenance.
  
• Keep connectors clean and corrosion-free.
  
• Perform diagnostic checks to monitor sensor performance.
  
• Clue’s equipment maintenance services help monitor exhaust systems and detect issues early before they affect engine performance.