What is the emergency protocol for SPN 4364 FMI 18?

1) Pull over at the first safe location. 2) Shut down engine. 3) Check for obvious issues (fluid leaks, smoke, loose connections). 4) Scan for secondary fault codes. 5) Call roadside assistance if unable to resolve. Do not attempt to limp the vehicle to a shop.

What happens if I ignore SPN 4364 FMI 18?

Ignoring a STOP ENGINE code can result in: turbocharger failure ($3,000–$8,000), engine seizure requiring complete overhaul ($15,000–$40,000), or fire risk from leaking fuel/oil onto hot exhaust components. If this code is accompanied by low oil pressure or high coolant temperature, engine failure may occur within minutes.

🔴 STOP ENGINE

Volvo SPN 4364 FMI 18: Meaning, Causes & Fix

SCR Inducement — vehicle speed limited to 5 mph unless fault corrected

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Diagnostic Reference

Field	Details
Code	`SPN 4364 FMI 18`
Protocol	J1939 SPN: 4364 FMI: 18
Component	SCR Aftertreatment System
Manufacturer	Volvo
Engine Series	D13
Severity	🔴 STOP ENGINE
SAE Reference	SAE J1939-73 Digital Annex — SPN 4364, FMI 18

Possible Causes

DEF tank completely empty
Multiple SCR system faults active simultaneously
NOx conversion efficiency dropped below inducement threshold
DEF quality severe contamination

Diagnostic & Repair Procedure

Step 1: Immediate action: refill DEF from sealed container
Step 2: Check for active SCR-related fault codes and address root cause first
Step 3: Perform SCR system reset with Volvo Tech Tool
Step 4: Full derate removal requires SCR efficiency test pass

Frequently Asked Questions

Can I keep driving with SPN 4364 FMI 18?

No. This is a STOP ENGINE-level fault. Continued operation will cause severe engine damage including potential catastrophic failure. Pull over safely and diagnose before restarting. Tow the vehicle to a service facility if the root cause cannot be identified and resolved at roadside.

What is the emergency protocol?

1) Pull over at the first safe location — use hazard lights and reflective triangles if on a highway shoulder. 2) Shut down engine. 3) Check for obvious issues: fluid leaks, smoke, loose connections, unusual odors. 4) Scan for secondary fault codes using a dash display or diagnostic tool — these often point to the root cause. 5) Call roadside assistance if unable to resolve. Do not attempt to limp the vehicle to a shop.

What happens if I ignore this code?

Ignoring a STOP ENGINE code can result in: turbocharger failure ($3,000–$8,000), engine seizure requiring complete overhaul ($15,000–$40,000), or fire risk from leaking fuel/oil contacting hot exhaust components. If this code is accompanied by low oil pressure or high coolant temperature, engine failure may occur within minutes of continued operation.

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 4375 FMI 7 🟡 CHECK AT NEXT STOP

DEF Pump Module Failure

SPN 174 FMI 0 🟡 CHECK AT NEXT STOP

Fuel Temperature

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

Speed Limited 5 Mph Derate Def Warning Scr Failure Tow Required

References & Further Reading

SAE J1939-73: Application Layer — Diagnostics. SAE International. Defines SPN 4364 / FMI 18 fault code semantics for heavy-duty CAN networks. SAE J1939 Standard
Volvo D13 Service Manual: OEM diagnostic procedures for SCR Aftertreatment System 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 4364 FMI 18 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.