What is MID 115 & How to Solve It?

What is MID 115:

MID 115 refers to a problem with the Engine Coolant Temperature Sensor. This fault code is generated when the ECM detects that the sensor is not functioning within the expected voltage range, potentially leading to improper temperature readings and causing engine overheating or poor fuel efficiency.

‍

Why This Happens:

• Faulty engine coolant temperature sensor.
  
• Shorted or damaged wiring in the sensor circuit.
  
• Loose or corroded connectors.
  
• Low coolant levels affecting sensor accuracy.
  
• ECM misinterpreting the sensor’s signal.
  
  

How to Fix It:

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

How to Avoid It Before It Happens:

• Regularly inspect the coolant temperature sensor and wiring.
  
• Keep connectors clean and corrosion-free.
  
• Maintain proper coolant levels and replace coolant as needed.
  
• Perform routine diagnostic checks to monitor coolant temperature sensor health.
  
• Clue’s Equipment Maintenance services ensure proper monitoring of the coolant system, preventing temperature-related issues before they affect engine performance.