Volvo Fault Codes — Complete Guide

Volvo SPN/FMI codes cover D11, D13, D16. This hub lists 43 diagnostic pages with symptoms, ranked causes, scan-tool steps, and 2026 repair costs — use INSITE, DiagnosticLink, or EST depending on your engine family.

By Professional Diesel Repair TeamPublished: January 2026Last updated: September 2026

How We Tested and Verified

Volvo fault code definitions cross-checked against SAE J1939-71 and Volvo OEM service bulletins. Diagnostic tips validated by field technicians September 2026.

Volvo Engine Platforms

Volvo engines covered on this site include: D11, D13, D16. Diagnostic procedures vary by platform — always verify against your specific engine serial number and calibration.

Most Common Volvo Fault Codes

Code	Component	Severity	Definition
SPN 100 FMI 1	Engine Oil Pressure	Critical	Engine oil pressure below normal — a critical low-oil-pressure condition that places the engine at immediate risk of bearing and component damage.
SPN 111 FMI 1	Engine Coolant Level Sensor	Critical	Coolant Level - Data Valid But Below Normal Operational Range
SPN 111 FMI 7	Engine Coolant Temperature Sensor	Critical	Engine Coolant Temperature - Mechanical System Not Responding Or Out Of Adjustment
SPN 1209 FMI 0	Exhaust Backpressure Sensor	Critical	Engine Exhaust Gas Pressure 1 - Data Valid But Above Normal Operational Range - Most Severe Level
SPN 1569 FMI 31	Engine Protection Torque Derate	Critical	Engine Protection Torque Derate - Condition Exists
SPN 190 FMI 0	Engine Speed Sensor Circuit	Critical	Engine Speed - Data Valid But Above Normal Operational Range
SPN 4364 FMI 3	SCR NOx Conversion Efficiency	Critical	Aftertreatment 1 SCR NOx Conversion Efficiency - Voltage Above Normal (FMI 3)
SPN D13-SCR FMI N/A	Volvo D13 SCR NOx Efficiency System	High	SCR NOx efficiency troubleshooting on Volvo D13 engines — sensor rationality, DEF dosing, and catalyst diagnosis with Volvo PTT
SPN 100 FMI 3	Engine Oil Pressure Sensor Circuit	High	Engine Oil Pressure - Voltage Above Normal, Circuit Shorted High
SPN 101 FMI 16	Engine Crankcase Pressure / Blow-By Monitoring	High	Engine Crankcase Pressure - Data Valid But Above Normal Operating Range - Moderately Severe Level
SPN 107 FMI 0	Engine Air Filter Differential Pressure Sensor	High	Engine Air Filter 1 Differential Pressure - Data Valid But Above Normal - Most Severe Level
SPN 157 FMI 18	Fuel Rail Pressure Sensor	High	Engine Injector Metering Rail 1 Pressure - Data Valid But Below Normal Operational Range - Moderately Severe Level
SPN 168 FMI 3	Battery / Charging System Circuit	High	Electrical Potential (Voltage) - Voltage Above Normal, Circuit Shorted High
SPN 2791 FMI 7	EGR Valve Control	High	Engine Exhaust Gas Recirculation 1 Valve Control - Mechanical System Not Responding
SPN 3216 FMI 0	SCR Intake NOx Sensor	High	Aftertreatment SCR Intake NOx Sensor - Data Valid But High
SPN 3226 FMI 0	SCR Outlet NOx Sensor	High	Aftertreatment SCR Outlet NOx Sensor - Data Valid But High
SPN 3226 FMI 9	SCR Outlet NOx Sensor	High	SCR Outlet NOx Sensor - Abnormal Update Rate
SPN 3363 FMI 1	DEF Tank Heater	High	Aftertreatment 1 Diesel Exhaust Fluid Tank Heater - Data Valid But Below Normal Operational Range - Most Severe Level
SPN 3363 FMI 16	DEF Tank Heater	High	Diesel Exhaust Fluid Tank Heater - Data Valid But Above Normal Operating Range
SPN 3364 FMI 9	DEF Quality	High	Aftertreatment DEF Quality - Abnormal Update Rate

Volvo-Specific Diagnostic Tips

Volvo PTT (Premium Tech Tool) accesses mid-frame aftertreatment module data.
Coolant level sensor failures on D13 often throw SPN 111 before actual low coolant.
Check EGR cooler internal leaks when oil dilution and white exhaust smoke appear together.