What is SPN 520197 & How to Solve It?

What is SPN 520197

SPN 520197: Refers to a fault related to the Engine Control Module (ECM) and indicates a failure in the exhaust gas recirculation (EGR) temperature sensor.

When SPN 520197 is triggered, it usually means the ECM is receiving incorrect or out-of-range data from the EGR temperature sensor, which could affect exhaust emissions and engine performance.

Why It Happened

This fault code is typically caused by:

• A malfunctioning EGR temperature sensor.
  
• Loose or damaged wiring between the sensor and ECM.
  
• Corrosion or contamination in the sensor or connectors.
  
• A failure in the EGR system itself, which is causing incorrect temperature readings.
  
• A software issue in the ECM affecting sensor data processing.
  
  

How to Resolve It

To resolve SPN 520197:

1. Inspect the wiring and connections between the EGR temperature sensor and ECM for any visible damage.
   
2. Test the EGR temperature sensor and replace it if faulty.
   
3. Check for any issues in the EGR system that could be affecting the sensor's readings.
   
4. After repairs, clear the fault code and restart the engine to verify the fix.

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How to Avoid Before It Happens

To prevent SPN 520197:

• Regularly inspect the EGR system and sensors for damage or contamination.
  
• Clean the EGR system to ensure proper function and prevent sensor failure.
  
• Use Clue to monitor sensor data in real-time and receive alerts on any irregularities.