Detailed guide for SPN 94 FMI 3
Back to top ↑SPN 94 FMI 3 – Fuel pressure voltage high
Voltage-high faults are usually wiring damage or water intrusion. If it started right after a storm or heavy slush driving, that’s not a coincidence.
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SPN 94 FMI 3: Fuel delivery pressure sensor circuit voltage high – short to power / bad sensor signal
Quick Answer
Fuel delivery pressure sensor circuit voltage high – short to power / bad sensor signal
Code
SPN 94 FMI 3
Severity
Warning
Applies to
Cummins
Can I drive?
Driving suitability is not established by this code alone.
Common Symptoms
- MIL/check engine
- Fuel pressure reading may be unrealistically high
- Driveability complaints vary (depends on fallback strategy)
Likely Causes
- Short to power in harness
- Water intrusion in connector
- Sensor internal fault
Common Fixes
- Inspect harness for rub-through, repair as needed
- Clean/dry connector and confirm pin tension
- Replace sensor only after wiring is verified
Full technical sections↓
What does SPN 94 FMI 3 mean?
Back to top ↑Fuel delivery pressure sensor circuit voltage high – short to power / bad sensor signal
Images for SPN 94 FMI 3 (location, common failures)
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Common rail diagram (general). Wiring faults can distort fuel pressure sensor signals.
Credit: Wikimedia Commons • License: Public Domain
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Mechanic community notes for SPN 94 FMI 3
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