What is SPN 3058 FMI 0 & How to Solve It? (Cummins)

What is SPN 3058 FMI 0:

SPN 3058 FMI 0 on Cummins engines refers to a fault in the Exhaust Gas Recirculation (EGR) Valve Position Sensor Circuit – No Fault Indicated. This means the engine control module (ECM) detected no current fault, but the sensor data may require verification or calibration. The EGR valve position sensor monitors the position of the EGR valve, which recirculates exhaust gases to reduce emissions.

‍

Why This Happens

Common reasons to check for SPN 3058 FMI 0 include:

• Sensor signal fluctuations or irregular readings.
  
• Wiring harness issues that may cause intermittent faults.
  
• Sensor calibration needed or ECM software updates.
  
• Mechanical sticking or sluggish EGR valve movement.
  
  

How to Fix It

To address this condition:

1. Inspect the EGR valve and sensor wiring for any damage or loose connections.
   
2. Verify sensor readings using diagnostic tools.
   
3. Calibrate or reset the sensor as per Cummins service procedures.
   
4. Check for EGR valve mechanical issues and clean or replace if necessary.
   
5. Clear any pending fault codes and monitor system performance.
   
   

How to Avoid It Before It Happens

Preventative steps include:

• Regular inspection and maintenance of the EGR system.
  
• Keeping wiring and connectors clean and secure.
  
• Staying up to date with ECM software and sensor calibration.
• Use Clue’s Preventive Maintenance to regularly inspect and maintain the EGR system, ensuring wiring is secure, and sensors are properly calibrated.