Vehicles

SPN 641 FMI [7 – 31] Engine Faults Explained

SPN 641 fault code means Engine Variable Geometry Turbocharger Actuator #1 has a problem.

Details for each FMI code:

  • 7 – Mechanical System Not Responding Or Out Of Adjustment
  • 9 – Abnormal Update Rate, communication lost.
  • 11 – Actuator #1 Root Cause Not Known
  • 12 – Actuator #1 Bad Intelligent Device Or Component
  • 13 – Actuator #1 Out Of Calibration
  • 15 – Actuator #1 Data Valid But Above Normal Operating Range – Least Severe Level
  • 31 – Condition Exists, Internal error, problem unknown.

 

Suggested things to do:

Verify ECM calibration. Check turbocharger actuator and connections.