What Causes the SPN 3226 FMI 20? How to Fix it?
SPN 3226 FMI 20 is a common aftertreatment fault caused by NOx sensor drift, wiring issues, or real SCR/DEF performance problems. This guide explains how to diagnose and fix it efficiently.

SPN 3226 FMI 20 is a common aftertreatment fault caused by NOx sensor drift, wiring issues, or real SCR/DEF performance problems. This guide explains how to diagnose and fix it efficiently.

This guide breaks it down for heavy equipment owners. We explain what each filter protects, the specific contaminants they stop, their unique design features, and the warning signs of failure. Understanding this is key to preventing costly repairs and keeping your fleet running strong.

The flaking snow on these freaking cold days heralds the arrival of snow removal season with your versatile skid steer. Whether you deal with such a job for the first time or for the fortieth time, you could feel the pain and sort of mess. Any mistake you make means damaged property, ruined machines, wasted time and fuel, all of which are actual losses. In this article, we list 5 common snow removal mistakes newbies make and practical tips to help you plow through the cold winter days.

P0138 is a common fault on off-road machinery, often caused by a failing downstream O2 sensor, wiring corrosion, or rich-running conditions. This guide breaks down real causes and proven repair steps.

Knowing how to change a fuel filter is vital maintenance. This guide provides a full walkthrough for heavy machinery, from finding the primary and secondary filters to the critical steps of pre-filling and priming to prevent air in the system.

That glowing DPF Warning Light can look scary, but it’s often just a cry for heat! Is your machine clogged with soot or the dreaded ash? Ignoring it leads to “limp mode,” but we have the fix. Discover 3 ways to clear the light, why idling is the enemy, and how to save your engine.

SPN 4364 FMI 31 indicates SCR NOx efficiency issues on off-road equipment. Learn causes, symptoms, diagnostics, and proven fixes to clear derates.

Groundhog Day is more than a tradition; it’s a key checkpoint for equipment maintenance. Whether the forecast means more winter or an early spring, this guide provides two simple, actionable plans to keep your machinery running and profitable.

Your excavator won’t start, and it’s freezing outside. Is your fuel liquid or jelly? Winter turns diesel into wax faster than you think. Use our Diesel Fuel Gelling Temperature Chart to spot the danger zone. Learn the critical difference between Cloud Point and Pour Point, and get 3 simple steps to stop the freeze before it stops you.

Is your transmission fluid burnt? Stop! Flushing it now could actually destroy your clutch packs. Off-road machines hate neglected fluid, but the wrong fix is worse than no fix. Discover the “half-interval” rule, the 7 deadly symptoms of failure, and how to decide between a full flush and a safe drain.

SPN 102 FMI 18 is a common fault on off-road machinery that signals low intake or boost pressure. This guide breaks down real-world causes, diagnostic steps, and proven fixes to help restore performance and prevent repeat downtime.

Is your engine losing power or smoking? Dirty injectors are a likely cause. This guide explains how to clean diesel injectors step-by-step, from disassembly and ultrasonic cleaning to reinstallation for restored performance.