What is SPN 1045 FMI 5 & How to Solve It?

What is SPN 1045 FMI 5

SPN 1045: Refers to a fault related to the intake manifold air pressure sensor, indicating that the intake manifold pressure is outside the expected range.

FMI 5: Indicates that the sensor is reporting data that is above the expected value, meaning the ECM is receiving higher-than-expected pressure readings.

Together, SPN 1045 FMI 5 signals an issue with the intake manifold pressure sensor, which could affect engine performance and air-fuel mixture.

‍

Why It Happened

This fault code is commonly caused by:

• A malfunctioning intake manifold pressure sensor.
  
• Blockages or restrictions in the intake system affecting pressure readings.
  
• A malfunctioning turbocharger or intake system component.
  
• Wiring issues or poor connections between the sensor and ECM.
  
  

How to Resolve It

To resolve SPN 1045 FMI 5:

1. Inspect the intake manifold pressure sensor for faults and replace it if necessary.
   
2. Check the intake system for blockages or restrictions.
   
3. Inspect the turbocharger and intake system components for malfunctions.
   
4. Test the wiring and connections for damage or corrosion.
   
5. After repairs, clear the fault code and restart the engine.
   
   

How to Avoid Before It Happens

To prevent SPN 1045 FMI 5:

• Check regularly the intake manifold system and sensors.
  
• Maintain a clean and unrestricted air intake system.
  
• Use Clue to monitor intake manifold pressure and receive early alerts on irregular readings.
• Conduct inspections frequently to prevent minor issues from becoming major repairs.