Nissan Titan XD Fault Codes — Complete Guide

Nissan Titan XD SPN/FMI codes cover 5.0L Cummins V8. This hub lists 56 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

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

Nissan Titan XD Engine Platforms

Nissan Titan XD engines covered on this site include: 5.0L Cummins V8. Diagnostic procedures vary by platform — always verify against your specific engine serial number and calibration.

Most Common Nissan Titan XD Fault Codes

Code	Component	Severity	Definition
SPN P0217 FMI N/A	Engine Cooling System	Critical	Engine Over Temperature Condition
SPN P0217 FMI N/A	Engine Cooling System	Critical	Engine Over Temperature Condition
SPN P0524 FMI N/A	Engine Oil Pressure	Critical	Engine Oil Pressure Too Low
SPN P2BAD FMI N/A	NOx Concentration Exceeded (Bank 1)	Critical	NOx Concentration Exceeded Bank 1
SPN 0093 FMI N/A	Fuel System	High	Fuel System Large Leak Detected on 5.0L Cummins V8
SPN 0216 FMI N/A	Injection Timing Control	High	Injection Timing Control Circuit Malfunction
SPN 0612 FMI N/A	Fuel Injector Control Module Relay	High	Fuel Injector Control Module Relay Control
SPN 2291 FMI N/A	Fuel Pressure Regulator	High	Injector Metering Rail 1 Pressure Too Low During Engine Cranking
SPN P0087 FMI N/A	Fuel Rail Pressure Sensor	High	Fuel Rail/System Pressure Too Low
SPN P0087 FMI N/A	Fuel Rail Pressure Sensor	High	Fuel Rail/System Pressure Too Low
SPN P0088 FMI N/A	Fuel Rail Pressure	High	Fuel Rail/System Pressure - Too High
SPN P0088 FMI N/A	Fuel Rail Pressure	High	Fuel Rail/System Pressure - Too High
SPN P0204 FMI N/A	Fuel Injector Circuit - Cylinder 4	High	Injector Circuit/Open - Cylinder 4
SPN P0219 FMI N/A	Engine Speed Control	High	Engine Overspeed Condition
SPN P0234 FMI N/A	Turbocharger Boost Sensor	High	Turbocharger/Supercharger Overboost Condition
SPN P0234 FMI N/A	Turbocharger Boost Sensor	High	Turbocharger/Supercharger Overboost Condition
SPN P0299 FMI N/A	Turbocharger Boost Control	High	Turbocharger/Supercharger Underboost Condition
SPN P0299 FMI N/A	Turbocharger Boost Control	High	Turbocharger/Supercharger Underboost Condition
SPN P0335 FMI N/A	Crankshaft Position Sensor Circuit	High	Crankshaft Position Sensor A Circuit Malfunction
SPN P0521 FMI N/A	Engine Oil Pressure Sensor / Switch Circuit	High	Engine Oil Pressure Sensor/Switch Range/Performance

Nissan Titan XD-Specific Diagnostic Tips

Nissan CONSULT III plus required for Titan XD Cummins 5.0L aftertreatment diagnostics.
5.0L Cummins V8 uses a unique DPF layout — regen parameters differ from Ram 6.7L.
Check DEF tank heater relay before winter SCR efficiency codes on Titan XD.