What is SPN 107 FMI 15 & How to Solve It?

What is SPN 107 FMI 15:

SPN 107 is related to Engine Intake Manifold Pressure, and FMI 15 indicates that the data is valid but below normal operating range.

This code typically means that the engine is running with lower-than-expected intake pressure, which reduces power, affects fuel efficiency, and can increase emissions if left unresolved.

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Why This Happens

This may be caused by:

• Leaks in intake piping or connections.
• A failing turbocharger or wastegate.
• A restricted or dirty air filter.
• Faulty intake manifold pressure sensor.
• The EGR valve stuck open and caused air pressure drop.

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How to Fix It

1. Check for loose intake hose connections or visible leaks.
2. Inspect the turbocharger and listen for spool-up delay or noise.
3. Replace clogged or old air filters.
4. Test and replace the intake pressure sensor if faulty.
5. Check for EGR valve issues contributing to pressure loss.
6. Clear the code and monitor performance after fix.

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How to Avoid It Before It Happens

1. Inspect intake components regularly for leaks or damage.
2. Replace air filters according to service intervals.
3. Keep the EGR and turbocharger systems clean and functional.
4. Log low-pressure readings before they trigger faults.