P24A3

Code

Generic P — Powertrain

Particulate Filter Restriction - Soot Accumulation Bank 2

Brand: Generic

Type: P — Powertrain

Views: UK: 18 EN: 99 RU: 31

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Page language: EN

Connect scan tool and read freeze frame and stored/pending codes; record live data during idle and road test
Check DPF differential pressure (inlet − outlet) at idle and load and compare to manufacturer limits
Monitor DPF inlet and outlet temperatures and soot mass or calculated soot load if available
Inspect wiring and connectors for differential pressure and temperature sensors for corrosion, damage, or poor connection
Check for related codes (fuel system, EGR, turbo, injectors) that could cause excess soot
Perform visual inspection of exhaust for leaks, damage, or restrictions upstream of DPF

Use OEM-capable scan tool and record trouble code details, freeze frame, and live data.
Confirm fault is current: clear code and perform monitored drive cycle or forced regen attempt; see if code returns.
Compare differential pressure and temperature readings to factory limits at idle and during a controlled loaded run; identify when/where pressure rises excessively.
Inspect and verify integrity of differential pressure sensor, harness, and connectors; backprobe sensor and confirm plausible voltage/pressure outputs.
Verify inlet/outlet exhaust temperature sensors are functioning and reading realistically; replace if out of range or intermittent.
Check for related fault codes (EGR, injectors, turbo, fuel delivery) and address those first if present—these often cause excess soot.
Perform fuel system and injector tests if excessive soot generation is suspected (leaks, poor spray, rich combustion).
If sensors and upstream systems are good and soot load is high, attempt manufacturer-approved DPF regeneration (forced/controlled regen) and recheck soot/differential pressure after regen.
If forced regen does not reduce pressure to acceptable levels, consider DPF cleaning (off-vehicle or professional on-vehicle cleaning) or DPF replacement for bank 2.
After repair/cleaning, verify successful regeneration with scan tool and road test; clear codes and confirm no recurrence over specified drive cycles.

High soot load in DPF (primary)
Defective or out-of-spec differential pressure sensor or harness (sensor reading too high)
Failed inlet/outlet exhaust temperature sensors giving incorrect readings to PCM
Excessive soot generation from injectors, EGR, or turbo issues preventing regen
Frequent short trips or low-speed use preventing passive/active regen