What is SPN 520372 & How to Solve It?

What is SPN 520372:

SPN 520372 refers to a communication failure with the Transmission Fluid Temperature Sensor. This fault code indicates that the ECM is unable to establish proper communication with the sensor, leading to incorrect readings and potential transmission performance issues.

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Why This Happens:

• Faulty transmission fluid temperature sensor.
  
• Damaged or shorted wiring in the sensor circuit.
  
• ECM communication failure with the sensor.
  
• Loose or corroded sensor connectors.
  
• Low fluid levels affecting sensor readings.
  
  

How to Fix It:

1. Inspect the transmission fluid temperature sensor for visible damage.
   
2. Test the wiring and connectors for continuity and proper connections.
   
3. Ensure the ECM can communicate correctly with the sensor.
   
4. Replace the faulty sensor if necessary.
   
5. Verify transmission fluid levels and ensure the system is functioning correctly.
   
   

How to Avoid It Before It Happens:

• Perform regular inspections of the transmission fluid temperature sensor and wiring.
  
• Maintain proper fluid levels in the transmission system.
  
• Clean connectors and prevent corrosion.
  
• Use diagnostic tools to check for sensor issues early.
  
• Clue’s Equipment Maintenance services help monitor transmission health and sensor performance to prevent issues before they affect vehicle operation.