How far can I drive with SPN 174 FMI 0?

This CHECK AT NEXT STOP code allows continued operation to a safe service location, typically within 50–100 miles. However, you should reduce engine load (avoid steep grades, reduce speed) and monitor related gauges closely. If secondary symptoms appear (smoke, noise, temperature spike), pull over immediately.

Will SPN 174 FMI 0 cause permanent engine damage if I keep driving?

If addressed promptly at the next stop, permanent damage is unlikely. However, prolonged operation (200+ miles) with this fault active can escalate the issue — for example, a DEF system fault will eventually trigger a full derate and speed limitation. Additionally, some CHECK NEXT STOP conditions can degrade into STOP ENGINE faults if the root cause worsens.

Can I clear SPN 174 FMI 0 myself or do I need a mechanic?

You can attempt the diagnostic steps outlined below. Many CHECK NEXT STOP codes have straightforward causes like low fluid levels, clogged filters, or loose connections that an owner-operator can address. However, if the code returns after clearing, the underlying fault requires professional diagnosis with a scan tool capable of viewing live data and freeze-frame information.

🟡 CHECK AT NEXT STOP

Volvo SPN 174 FMI 0: Meaning, Causes & Fix

Fuel Temperature — data valid but above normal operational range

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Diagnostic Reference

Field	Details
Code	`SPN 174 FMI 0`
Protocol	J1939 SPN: 174
Component	Fuel Temperature Sensor / Fuel Cooler
Manufacturer	Volvo
Engine Series	D13
Severity	🟡 CHECK AT NEXT STOP
SAE Reference	SAE J1939-73 Digital Annex — SPN 174, FMI 0

Possible Causes

Fuel cooler fins clogged with road debris
Fuel return line restricted increasing return fuel temp
Operating in extreme ambient heat (above 110°F)
Fuel tank level critically low (fuel used as coolant for HP pump)
Fuel temperature sensor bias high from internal fault

Diagnostic & Repair Procedure

Step 1: Clean fuel cooler fins with compressed air — common issue in dusty environments
Step 2: Check fuel return line for kinks or restrictions
Step 3: Fill fuel tank above 1/4 (fuel cools the HP pump)
Step 4: Monitor fuel temp sensor reading vs ambient — should be within 30°F after cooldown
Step 5: Replace sensor if bias confirmed

Frequently Asked Questions

How far can I drive with this code?

This CHECK AT NEXT STOP code allows continued operation to a safe service location, typically within 50–100 miles. Reduce engine load (avoid steep grades, reduce cruising speed) and monitor related gauges closely. If secondary symptoms develop — smoke, unusual noise, temperature spike — pull over immediately.

Will this cause permanent engine damage if I keep driving?

If addressed promptly at the next stop, permanent damage is unlikely. However, prolonged operation (200+ miles) with this fault active can escalate the issue. For example, DEF system faults will eventually trigger a full derate and speed limitation to 5 mph. Some CHECK NEXT STOP conditions degrade into STOP ENGINE faults if the root cause worsens — do not postpone service indefinitely.

Can I diagnose this myself or do I need a mechanic?

You can attempt the diagnostic steps listed above. Many CHECK NEXT STOP codes have straightforward causes — low fluid levels, clogged filters, or loose connectors — that an owner-operator can address. However, if the code returns after clearing, the underlying fault requires professional diagnosis with a scan tool capable of viewing live data and freeze-frame information.

Diesel Repair Cost & Downtime Estimator

Enter estimated labor hours to calculate repair cost and potential fleet downtime losses. Based on national average diesel shop rate of $150/hr and daily revenue loss of $800/day for a parked truck.

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Related Fault Codes — D13

SPN 4364 FMI 18 🔴 STOP ENGINE

SCR Inducement

SPN 4375 FMI 7 🟡 CHECK AT NEXT STOP

DEF Pump Module Failure

SPN 3031 FMI 9 🟠 CHECK SOON

DEF Quality Sensor

MID 128 PSID 90 FMI 4 🟠 CHECK SOON

EGR Differential Pressure Sensor

SPN 107 FMI 16 🟠 CHECK SOON

Air Filter Restriction excessive

SPN 84 FMI 0 🟠 CHECK SOON

Vehicle Speed Signal

Associated Symptoms

Engine Derate Loss Of Power Fuel Economy Decreased Hard Starting When Hot Check Engine Light

References & Further Reading

SAE J1939-73: Application Layer — Diagnostics. SAE International. Defines SPN 174 / FMI N/A fault code semantics for heavy-duty CAN networks. SAE J1939 Standard
Volvo D13 Service Manual: OEM diagnostic procedures for Fuel Temperature Sensor / Fuel Cooler faults. Consult the official Volvo service documentation for your specific engine serial number.
TMC RP 1210: Recommended Practice for Windows-Based Vehicle Diagnostic Interface. Technology & Maintenance Council (TMC) of American Trucking Associations.

Data Provenance: This fault code definition is derived from SAE J1939 standards. SPN 174 FMI 0 is defined in SAE J1939-73 Digital Annex. Diagnostic procedures sourced from Volvo OEM technical service documentation. Not for safety-critical decisions. Consult a certified diesel mechanic before performing any repair. See our full disclaimer.