Code Details
| Display code | SPN 175 FMI 0 |
|---|---|
| SPN | 175 |
| FMI | 0 |
| OEM code | None listed |
| Manufacturer | Volvo |
| System | Engine �?lubrication / cooling |
| Component | Engine oil cooler / cooling system / oil temperature sensor |
| Source address | Unknown or not applicable |
| Severity | high |
| Review status | source backed |
| Source confidence | medium |
| Last reviewed | 2026-06-12 |
Plain-English Meaning
The Volvo D13 uses an internal oil cooler to transfer heat from engine oil into the coolant circuit. SPN 175 FMI 0 means oil temperature exceeded the protection threshold. On Volvo VNL, VNX, and VHD trucks, a cooling system failure �?low coolant, restricted radiator, or a fan clutch not engaging �?is the primary cause. If the cooling system is healthy but oil runs hot, the oil cooler core may be fouled with scale from deferred coolant maintenance. On Volvo VNL and VHD trucks with the D13, the engine oil temperature sensor is located in the oil gallery and reports to the EMS3. VCADS Pro can display oil temperature alongside EGR cooler temperature and coolant temperature simultaneously to help identify the source of the thermal overload. A partially blocked oil cooler — identifiable by elevated oil temperature alongside normal coolant temperature — responds to flushing or oil cooler replacement. If both oil and coolant temperatures are elevated together, the root cause is more likely in the main cooling circuit.
SPN 175 FMI 0 is Engine Oil Temperature above normal range. On Volvo D13 with EMS3, VCADS Pro displays live oil and coolant temperatures. Monitoring both in real time under load is the key diagnostic step �?both temperatures elevated points to the external cooling system; oil elevated with normal coolant points to the internal oil cooler.
Common Symptoms
- Oil temperature warning on the Volvo instrument panel
- Engine protection derate possible at sustained high oil temperature
- May occur with elevated coolant temperature in demanding conditions
Possible Causes
Possible causes may include the items below. The list is not a parts diagnosis.
- Cooling system deficiency: low coolant, restricted radiator, or failing fan clutch
- Internal oil cooler fouled with coolant scale
- Thermostat stuck or incorrect specification
- Oil temperature sensor fault
First Checks
- Connect VCADS Pro and compare oil and coolant temperatures under steady-state load
- Check coolant level, condition, and freeze protection
- Test fan clutch engagement via VCADS Pro fan clutch activation test
- Inspect radiator for external debris or internal restriction
- If coolant is normal but oil is high, suspect oil cooler fouling
- Connect VCADS Pro and monitor oil temperature alongside coolant temperature to identify the heat source
- Check the oil cooler bypass valve for proper operation — a stuck open valve bypasses cooler function
Can I Keep Driving?
The D13 will derate to protect against oil temperature damage. Address immediately.
Related Codes
Related Lookup Pages
Sources
- Volvo Trucks Tech Info Public Resources Volvo Trucks North America · oem · accessed 2026-06-11 · confidence medium
Source: Volvo Trucks North America, Volvo Trucks Tech Info Public Resources. This page paraphrases factual fields only and is not a substitute for the original document.
Open source - Volvo Trucks / Mack Trucks Technical Support Volvo Trucks North America / Mack Trucks Inc. · oem · accessed 2026-06-10 · confidence medium
Source: Volvo Trucks North America / Mack Trucks Inc., Volvo Trucks / Mack Trucks Technical Support. This page paraphrases factual fields only and is not a substitute for the original document.
Open source - SAE J1939 Standards Collection SAE International · official · accessed 2026-05-05 · confidence medium
Source: SAE International, SAE J1939 Standards Collection. This page paraphrases factual fields only and is not a substitute for the original document.
Open source
FAQ
Can the Volvo D13 oil cooler be descaled without removal?
Some coolant descaling treatments can partially restore oil cooler performance if scale is not severely deposited. A complete flush with a Volvo-approved descaler run through the cooling circuit is the conservative approach. For severe fouling confirmed by a large oil-to-coolant temperature differential, physical removal and cleaning or replacement of the oil cooler core is the definitive fix.
How does the Volvo D13 fan clutch interact with oil temperature management?
The D13 fan clutch is thermostatically and electronically controlled. VCADS Pro can activate the fan clutch on demand for testing. A fan clutch that is not engaging under thermal demand �?stuck in partial engagement �?allows the engine to overheat under load. A VCADS Pro fan clutch test during a warming engine confirms proper engagement.
Does the Volvo D13 oil cooler use the same coolant as the EGR cooler?
Yes. The D13 EGR cooler and oil cooler both use engine coolant for heat exchange. Scale buildup that reduces oil cooler performance typically also affects EGR cooler performance. Checking for companion EGR temperature faults alongside SPN 175 FMI 0 helps determine if the cooling system is generally compromised.