SPN 175 — Engine Oil Temperature 1
System: Lubrication
Temperature of the engine oil.
Can I keep running it?
HIGH — limit use, diagnose now
High oil temperature thins oil and can damage bearings. Reduce load and get it checked.
Likely causes
- Engine overloaded or overheating
- Plugged oil cooler
- Low oil level
- Sensor or wiring fault
Checks & fixes (easiest first)
- Check oil level and coolant temperature
- Inspect the oil cooler
- Compare sensor reading to coolant temp after warmup
Common FMIs with SPN 175
- SPN 175 FMI 0Value too high (most severe)
- SPN 175 FMI 2Data erratic, intermittent, or incorrect
- SPN 175 FMI 3Voltage above normal or shorted high
- SPN 175 FMI 4Voltage below normal or shorted low
- SPN 175 FMI 15Value too high (least severe)
- SPN 175 FMI 16Value too high (moderately severe)
Related codes
FAQ
What does SPN 175 mean?
SPN 175 is Engine Oil Temperature 1. Temperature of the engine oil.
Can I keep running with SPN 175?
High oil temperature thins oil and can damage bearings. Reduce load and get it checked.
What causes SPN 175?
Engine overloaded or overheating; Plugged oil cooler; Low oil level; Sensor or wiring fault.