SPN 97 — Water in Fuel Indicator
System: Fuel
Signals that the fuel/water separator has collected enough water to trip its sensor.
Can I keep running it?
MEDIUM — fix soon
Drain the separator soon. Water reaching a common-rail system can destroy injectors and pumps.
Likely causes
- Water collected in the separator bowl
- Contaminated fuel from the supply
- Faulty water-in-fuel sensor or wiring
Checks & fixes (easiest first)
- Drain the water separator
- Check fuel from the tank bottom for water
- Inspect the WIF sensor and connector
- Replace the filter element if contaminated
Common FMIs with SPN 97
- SPN 97 FMI 0Value too high (most severe)
- SPN 97 FMI 3Voltage above normal or shorted high
- SPN 97 FMI 4Voltage below normal or shorted low
- SPN 97 FMI 15Value too high (least severe)
- SPN 97 FMI 16Value too high (moderately severe)
Related codes
FAQ
What does SPN 97 mean?
SPN 97 is Water in Fuel Indicator. Signals that the fuel/water separator has collected enough water to trip its sensor.
Can I keep running with SPN 97?
Drain the separator soon. Water reaching a common-rail system can destroy injectors and pumps.
What causes SPN 97?
Water collected in the separator bowl; Contaminated fuel from the supply; Faulty water-in-fuel sensor or wiring.