Diagnostic Trouble Code

P2463

Diesel Particulate Filter Restriction — Soot Accumulation

What the code means

The ECU has determined that soot loading or restriction in the DPF has become excessive.

P2463 indicates excessive diesel particulate filter soot accumulation or restriction. It tells us the DPF has reached a condition the ECU considers too heavily loaded, but it does not automatically tell us why that happened.

A heavily loaded DPF can be the result of another fault repeatedly preventing successful regeneration. Before condemning the filter, establish whether the engine and regeneration system are capable of creating the conditions needed to burn the accumulated soot.

The Speed Tweaks video on this page follows a Ford Galaxy 2.2 diesel with P2463 and P246B. In that case, diagnosis led to the exhaust fuel-vaporizer system, where a faulty vaporizer prevented the regeneration system from operating correctly.

Possible causes

What could cause P2463?

Repeated unsuccessful or interrupted DPF regenerations

Fault preventing the exhaust from reaching regeneration temperature

Fuel-vaporizer or regeneration fuel-dosing fault where fitted

Vaporizer glow-plug, fuse, wiring or supply fault where fitted

Excessive soot production from an underlying engine fault

DPF differential-pressure measurement problem

Blocked or damaged DPF pressure pipes

Genuinely excessive DPF soot loading or restriction

Diagnostic approach

What should you check?

1. Read the complete fault memory. Look for accompanying regeneration, temperature, pressure, fuel-system or engine-management faults. P2463 may be the result of another problem rather than the original cause.
2. Check soot load and DPF pressure data. Use suitable live data to establish what the ECU believes the soot loading and differential pressure are doing before deciding the filter itself is faulty.
3. Find out why regeneration has not succeeded. Check whether the conditions needed for regeneration are actually being achieved, including relevant exhaust temperatures and any enabling conditions used by the vehicle.
4. Check the regeneration hardware. On the Ford 2.2 diesel application shown in the Speed Tweaks video, this included checking the vaporizer glow-plug fuse and inspecting and testing the exhaust fuel vaporizer and glow-plug arrangement.
5. Check DPF pressure and restriction. Verify that the pressure measurement is believable and assess the actual level of restriction rather than relying on the code number alone.
6. Correct the cause before forcing regeneration. If another fault is preventing regeneration, repair that problem first. Attempting regeneration without correcting the cause may simply fail again or place unnecessary stress on the system.
7. Confirm the repair. After the underlying fault has been corrected and the DPF dealt with appropriately, confirm that regeneration can complete and that soot load, pressure and fault status return to sensible values.

Speed Tweaks diagnostic video

Watch the P2463 diagnostic process

Watch the Speed Tweaks workshop guide to diagnosing P2463.

Watch on YouTube →

A useful thing to remember

When a DPF is full of soot, ask why it became full. Fixing the reason regeneration failed is just as important as dealing with the soot already in the filter.