Fault Family System: Powertrain (P-Codes) 4 SAE Codes

DPF Soot Accumulation

Diagnostic & Technical Explanation

Code P243F (Particulate Filter Restriction - Soot Accumulation Too High Bank 2) sets when the DPF's calculated soot mass, derived from differential pressure and the regeneration model, exceeds the threshold for normal operation or the threshold that forces reduced power to protect the filter from an uncontrolled regeneration event. Habitual short-trip driving that prevents regeneration, a leaking injector or over-fueling condition adding excess soot, or a failed differential-pressure sensor mis-reporting loading are the common causes.

These 4 diagnostic trouble codes share one detection mechanism and one repair path, which is why MechanicDB groups them into a single authored fault family rather than repeating the same explanation 4 times.

Codes in this family (4)

Code	Definition	Repair coverage
P243F	Particulate Filter Restriction - Soot Accumulation Too High Bank 2	4 ranked fixes
P2463	Particulate Filter Restriction - Soot Accumulation Bank 1	4 ranked fixes
P24A3	Particulate Filter Restriction - Soot Accumulation Bank 2	4 ranked fixes
P24A4	Particulate Filter Restriction - Soot Accumulation Too High Bank 1	4 ranked fixes

What this page does not show

This page publishes the fault mechanism and the code index. The licensed dataset adds, for every one of the 15,886 codes, the full authored repair set (56,729 procedures in total) with the fields deliberately withheld here:

Procedures 2..n after the first-listed procedure
Aftermarket parts cost ranges in USD (est_parts_cost_min/max_usd)
Professional labor-hour estimates (est_labor_hours)
Step-by-step diagnostic and repair instructions
Replacement-part mappings and catalog lookups
6,637 manufacturer-specific OEM codes across 32 makes ($149 tier)

Need All 15,886 Codes as Data?

Pipe-delimited CSV, Apache Parquet and a relational SQLite database, with commercial application rights and instant download. Built for scan tools, shop software and research - not assembled one web page at a time.

License OEM Complete · $149 Standard (SAE only) · $49

$49 Standard: 9,249 SAE codes · $149 OEM Complete: all 15,886 codes, including 6,637 OEM codes across 32 makes · $149 Heavy Duty: 4,212 fault pairs (J1939) · one-time · compare tiers