OBD-II code family
Particulate Filter Regeneration and Soot Loading Faults (3 codes)
3 related fault descriptions. Use each full code and the exact vehicle service information to identify its circuit, monitored condition, and required tests.
Codes in this family
This is the complete published member list for this guide. Each code retains its own page; shared diagnostic context does not mean that every member has the same test or repair.
What these codes mean
P2458 concerns regeneration duration or completion; P2459 concerns regeneration frequency; P2463 concerns the soot-loading or restriction decision. They are related observations, not three interchangeable instructions to regenerate or replace the filter. Preserve the full report and present warning state before choosing an action.
For duration, identify which phase failed. Hino SB-19-013 describes a manual-regeneration warm-up failure for the listed 2016–2020 COE J05E trucks. The relevant temperatures do not reach the required region, and the covered application can restrict output. This is different from assuming every duration fault needs another long drive.
For frequency, establish how the vehicle counts events and evaluates the interval. Ford’s covered 2023–2024 diesel monitor uses completed regeneration events with stated prerequisites, whereas the cited 2014 Passat CKRA table describes a loading calculation against a dynamic threshold. An interval or successful-event assumption from one example cannot be transferred to every engine.
For soot loading, distinguish the controller’s calculated result from confirmed physical filter condition. The Passat table explicitly uses calculated loading. Volkswagen’s April 24, 2015 bulletin for its listed CVCA/CRUA TDI applications describes software-related soot-mass and regeneration-time data concerns that can set P2463 or P2458. These are bounded examples, not a universal software cure.
The current warning determines the next step. GM’s September 2017 bulletin distinguishes a cleaning-message phase from a reduced-power/service state on its listed diesel vehicles and sends P2463 through vehicle diagnosis before owner counseling. An earlier instruction to continue driving does not establish that self-cleaning remains available after the state changes.
Keep regeneration history, recent oil/filter/exhaust work, complete failure records and accompanying engine, pressure or temperature results. Have qualified personnel validate relevant inputs, actual loading, prerequisites and the reason normal regeneration has not met the expected result. A frequency code alone does not diagnose injectors, a turbocharger or ash accumulation.
Do not force repeated regenerations, alter loading counters, bypass the filter or follow a generic time/speed prescription from the code alone. A service tool offering a command is not evidence that the present load, active faults and exhaust surroundings permit it. Use the matched procedure and its safety assessment.
The demonstrated cause and filter condition determine the repair, approved cleaning or permitted regeneration. Obtain a quote for that actual job and verify the relevant monitor afterward. Follow current warnings and arrange assistance for unsafe reduced power, overheating, severe smoke, an abnormal oil concern or an instruction to stop.
Identify the circuit on your vehicle
Match the full DTC, reporting module, and any failure-type suffix to the service information for your exact year, make, model, engine, and equipment. An identifier alone does not establish installed hardware count, location, connector pinout, or a universal measurement.
Where the manufacturer publishes its own meaning for this code, that is the one to work from — it describes the actual component on your vehicle, which the generic definition cannot. Keep the generic description for what it is good for: it tells you which subject area the standard assigned the code to, which is useful context when the two appear to disagree. If they do disagree, follow the manufacturer.