What is MID 255 & How to Solve It?

What is MID 255:

MID 255 refers to a problem with the Engine Coolant Temperature Sensor Circuit. The ECM detects that the coolant temperature sensor is out of range, potentially causing engine mismanagement or overheating.

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Why This Happens:

• Faulty engine coolant temperature sensor.
  
• Shorted or damaged wiring in the sensor circuit.
  
• Loose or corroded sensor connectors.
  
• Low coolant levels causing inaccurate sensor readings.
  
• ECM misinterpretation of sensor data.
  
  

How to Fix It:

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

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 perform scheduled coolant system maintenance.
  
• Perform routine diagnostic checks to monitor sensor performance.
  
• Clue’s Equipment Maintenance services ensure coolant systems are functioning optimally and sensors are performing accurately.