Diesel Repair Blog — Page 5
Long-form field guides for heavy-duty trucks — written for drivers and shop techs who need practical answers. Looking for a specific code? Search the diesel fault code library.
Showing 49–60 of 119 articles
Diagnostics
How Do I Get Diesel Out Of Clothes: Heavy-Duty Diesel Guide
Diesel fuel on clothes stains fast and smells worse after washing. Learn proven steps to lift fuel from fabric, neutralize odor, and avoid setting the stain in the dryer.
2026-08-09
Careers
How Do You Become A Diesel Mechanic: Heavy-Duty Diesel Guide
Want to become a diesel mechanic? Explore trade school, apprenticeship, ASE certifications, shop tools, and the skills heavy-duty fleets and repair bays expect from new hires.
2026-08-09
Engine
Are Diesel Engines More Reliable: What Techs and Drivers Should Know
Diesel engines often outlast gas engines when fuel quality, oil intervals, and aftertreatment service stay on schedule — but neglect hits diesels harder.
2026-08-08
Engine
Do Diesel Engines Have Spark Plugs: Heavy-Duty Diesel Guide
Diesel engines do not use spark plugs — compression heat ignites the fuel. Glow plugs, grid heaters, and injectors handle cold starts on stock trucks.
2026-08-08
Aftertreatment
Do Diesels Need A Catalytic Converter: Heavy-Duty Diesel Guide
Yes—modern heavy-duty diesels need catalytic aftertreatment (DOC, DPF, SCR). Learn what each stage does, model-year rules, and how to diagnose converter faults.
2026-08-08
Aftertreatment
Does A Diesel Have A Catalytic Converter: Heavy-Duty Diesel Guide
Yes—a diesel has catalytic stages in aftertreatment: DOC, DPF, and SCR. See where they sit, how to spot them, and what codes mean when they fail.
2026-08-08
Engine
Does Diesel Last Longer Than Gas: Heavy-Duty Diesel Guide
Diesel engines often outlast gas in heavy-duty use—lower RPM, stronger internals, and better thermal efficiency. See what actually drives engine life in fleets.
2026-08-08
Diagnostics
SPN 1569 FMI 31: Engine Protection Shutdown and Safe Recovery Steps [2026 Diagnostic Guide]
SPN 1569 FMI 31 means engine protection shutdown is active—not the root fault. Read stacked codes, verify oil and coolant, then reset only after the trigger is fixed.
2026-08-03
Diagnostics
P0299 Code on a Diesel Truck: Turbo Underboost Diagnosis and Fix [2026 Diagnostic Guide]
P0299 means measured boost stayed below ECM target—often a charge-air leak or stuck VGT. Test leaks and actuator sweep before replacing the turbo.
2026-07-29
Diagnostics
P0402 Code on a Diesel Truck: EGR Flow Excessive Diagnosis and Fix [2026 Diagnostic Guide]
P0402 means the ECM measured more EGR flow than commanded—usually a stuck-open valve, leaking seat, or bad sensor. Command-close test before replacing parts.
2026-07-28
Diagnostics
P0088 Code on a Diesel Truck: Fuel Rail Pressure Too High Diagnosis [2026 Diagnostic Guide]
P0088 means rail pressure exceeded the ECM target—often a restricted return line, stuck relief valve, failing HP pump regulator, or a bad sensor.
2026-07-27
Diagnostics
P2263 Code on a Diesel Truck: Turbo Boost System Performance Diagnosis [2026 Diagnostic Guide]
P2263 means the ECM detected turbo boost control performance outside spec—usually a stuck VGT actuator, boost leak, or sensor fault, not a failed turbo.
2026-07-27
Showing 49–60 of 119 articles