DPF Problems: Causes, Diagnosis and Prevention
Separate soot accumulation from ash maintenance and component faults, then address the operating conditions or failures behind repeated DPF warnings.
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Category: Blog
Explore the blog on high-quality truck engines from Cummins, CAT, Navistar, and Detroit.
Active and Stored Fault Codes: How to Use Both
Active faults describe a detected condition; stored or inactive faults preserve useful history. Interpret both with the controller's detection rules and the complaint.
Read more ↗Bidirectional Controls and Active Diagnostic Tests
Supported active tests let software request a controlled action, then compare the system's response. Availability and preparation depend on the controller.
Read more ↗Injector Trim Coding: Purpose and Workshop Checks
On systems that use individually coded injectors, the correct code must match the injector and cylinder. Coding requirements depend on the engine.
Read more ↗ECM Calibration: What It Is and When an Update Is Needed
Separate calibration updates from ordinary parameter changes, check the exact engine and controller, and confirm the license and approved programming process.
Read more ↗Passive, Active and Parked DPF Regeneration
Regeneration methods differ in how heat is available and how the operation is requested. A parked regeneration is not a separate filter-cleaning chemistry.
Read more ↗Diesel Aftertreatment Explained: DOC, DPF, SCR and DEF
Understand what each aftertreatment component does and why diagnosis must distinguish soot loading, sensor faults and SCR or DEF concerns.
Read more ↗Getting Started with Heavy-Duty Truck Diagnostics
Build a compatible setup, save an initial vehicle report and use service information to turn fault codes and live data into a supported diagnosis.
Read more ↗Preparing a Laptop Connection to a Truck Diagnostic Port
Check the application, adapter, driver and cable as a complete setup, then confirm the controllers detected before relying on the diagnostic session.
Read more ↗Understanding SPN and FMI in J1939 Fault Codes
An SPN identifies the parameter involved and an FMI describes the reported failure condition. Use the complete code with the correct controller's service information.
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