What is SPN 16 & How to Solve It?

What is SPN 16:

SPN 16 refers to a problem with the Engine Coolant Temperature Sensor. The ECM detects that the signal from the sensor is out of range, which could affect the engine’s cooling system and potentially cause overheating.

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Why This Happens:

• Faulty engine coolant temperature sensor.
  
• Damaged or shorted wiring in the sensor circuit.
  
• Loose or corroded connectors in the sensor circuit.
  
• Low coolant levels affecting sensor functionality.
  
• ECM misinterpretation of the sensor’s signal.
  
  

How to Fix It:

1. Inspect the engine coolant temperature sensor for visible damage.
   
2. Test the sensor’s voltage and resistance to ensure it is functioning within expected parameters.
   
3. Check the wiring and connectors for damage, corrosion, or loose connections.
   
4. Replace the faulty sensor if necessary.
   
5. Ensure coolant levels are maintained and the system is properly functioning.
   
   

How to Avoid It Before It Happens:

• Regularly inspect the coolant temperature sensor and wiring.
  
• Keep connectors clean and free from corrosion.
  
• Maintain proper coolant levels and replace coolant when needed.
  
• Perform diagnostic checks to ensure the sensor is functioning correctly.
  
• Clue’s Equipment Maintenance services monitor coolant systems and sensors to prevent overheating and engine mismanagement.