Detailed guide for SPN 3318 FMI 2
Back to top ↑Temperature sensors erratic readings mislead the regen strategy. Sensor harness routing and connector corrosion are common culprits.
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Share ↓SPN 3318 FMI 2Severity: Warning
SPN 3318 FMI 2: DPF intake gas temp erratic – sensor data noise
Quick Answer
DPF intake gas temp erratic – sensor data noise
Code
SPN 3318 FMI 2
Severity
Warning
Applies to
Check OEM application
Can I drive?
Driving suitability is not established by this code alone.
Common Symptoms
- DPF temps fluctuate oddly
- Regens look unpredictable
- Idle feel weird
Likely Causes
- Sensor harness noise
- Connector contamination
- Sensor drift
Common Fixes
- Check and secure sensor wiring
- Clean connectors
- Replace temp sensor if readings unstable
Full technical sections↓
What does SPN 3318 FMI 2 mean?
Back to top ↑DPF intake gas temp erratic – sensor data noise
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