What is SPN 3058 FMI 16 & How to Solve It?

What is SPN 3058 FMI 16:

SPN 3058 FMI 16 indicates a fault with the Exhaust Gas Recirculation (EGR) Valve Position Sensor Circuit – Intermittent/Erratic Signal. This means the engine control module (ECM) is receiving an inconsistent or unstable signal from the EGR valve position sensor, which can disrupt proper EGR valve operation and affect emissions control and engine performance.

‍

Why This Happens

Common causes include:

• Faulty or failing EGR valve position sensor.
  
• Damaged, loose, or corroded wiring/connectors.
  
• Mechanical issues causing EGR valve movement problems.
  
• Faulty ECM or sensor calibration errors.
  
  

How to Fix It

To resolve this fault:

1. Inspect the EGR valve position sensor and wiring for damage or corrosion.
   
2. Test the sensor for consistent signal output; replace if faulty.
   
3. Check the EGR valve for mechanical issues or sticking and clean or replace as needed.
   
4. Repair or replace damaged wiring or connectors.
   
5. Clear the fault code and monitor system performance.
   
   

How to Avoid It Before It Happens

Prevent this fault by:

• Regularly inspecting the EGR valve and position sensor.
  
• Maintaining the EGR valve to prevent carbon buildup.
  
• Performing routine diagnostics to detect early signal irregularities.
• Use Clue’s Preventive Maintenance to schedule regular inspections of the EGR valve and position sensor to ensure optimal performance and avoid signal irregularities.