What is SPN 1347 FMI 5 & How to Solve It?

What is SPN 1347 FMI 5:

SPN 1347 refers to the Aftertreatment 1 DPF Intake Pressure Sensor, and FMI 5 indicates the current is below the normal operating range, often due to an open circuit or failed sensor.

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Why This Happens

• Wiring issue to the pressure sensor.
• Sensor unplugged, corroded, or failed internally.
• Poor ground or shorted signal wire.

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How to Fix It

1. Inspect wiring harness and connector for breaks or corrosion.
2. Test sensor voltage and continuity.
3. Replace sensor if no signal is detected.
4. Clear the fault and verify real-time pressure data.

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How to Avoid It Before It Happens

1. Replace pressure sensors as recommended by OEM.
2. Clean sensor ports and tubing to prevent clogging.
3. Keep wiring sealed and away from heat zones.
4. Leverage Clue’s Equipment Tracking to monitor real-time data from the DPF intake pressure sensor and identify any irregularities before they impact system performance.

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