Toyota Land Cruiser P2463:00 Particulate Filter Restriction

Описание: Toyota Land Cruiser DPF Issue: Diagnosis and DIY Cleaning Step-by-Step

This particular vehicle came in after a long drive—about 200 miles—to get help. It’s a rarely seen 2023 Toyota Land Cruiser.
Upon hopping inside, the dashboard told a clear story of trouble:

Engine warning light on
Traction control warning light active
Check engine light illuminated
EPF (Exhaust Particulate Filter) full warning that refuses to clear


Diagnostic Process and What the Fault Codes Reveal

To pinpoint the problem, a Launch X431 Euro diagnostic scanner was used, set to recognise the vehicle as a Toyota Land Cruiser Prado.

Several fault codes popped up:

P2463: DPF Blocked
P2436:00: Diesel Particulate Filter
ABS and traction control errors

another code can be P2458-00 Diesel Particulate Filter Regeneration Duration

A blocked DPF often causes a chain reaction, triggering unrelated faults like ABS errors, which seems to have happened here. The scanner’s interface even showed some characters in Japanese, reflecting the Japanese origin of the Land Cruiser.

A quick check showed the DPF’s soot level at roughly 170%, which is well above the normal range. At such a high value, the vehicle disables the manual regeneration feature designed to burn off the soot before it gets to this critical state. The driver had tried pressing the manual regen button down below the dash but got no response because the block was too severe.

Troubleshooting Steps for DPF-Related Faults

Confirm presence of fault codes related to soot or DPF blockages.
Check soot pressure and percentage fill levels on diagnostic tool.
Attempt manual regeneration if soot levels are below lockout limits.
Inspect associated systems affected by DPF fault, such as ABS or traction control.

How the DPF Cleaning Was Carried Out

Cleaning the DPF properly is vital before attempting regenerations or resets. Using a Launch DPF cleaning fluid connected to a compressed air setup, fluid was sprayed into the DPF pressure sensor port carefully.

The cleaning steps were:

1. Loosen the hose connected to the DPF pressure sensor port.
2. Inject bursts of cleaner fluid into the port to flush soot deposits.
3. Run the engine at about 3,000 RPM to circulate the fluid inside the filter.
4. Repeat fluid injection and circulation until cleaning is saturated.

While performing these steps, the customer shared that the vehicle had been to two different Toyota dealers. Both dealers tried forced regenerations but only managed to reduce soot levels from 170% to about 128%. Their conclusion was expensive: a replacement DPF costing around £3,500.

The dealers refused warranty coverage, blaming driving habits for the problem and stating the filter is a consumable part. However, i suspected the issue was not solely the filter but a faulty fifth injector (also called a diesel vaporiser). This part heats the DPF by injecting diesel during regeneration. If it fails, the filter never reaches high enough temperatures to burn off soot effectively, causing a block.

Bringing the Vehicle Back to Life Post-Cleaning

After fluid cleaning, soot levels dropped to that of a new DPF.

However, the fault lights remained on because the electronic systems still showed an unresolved error; the particle matter values couldn’t be reset via diagnostics alone. This is common since simply resetting the error without a full regeneration can damage the DPF.

The manual regen button worked now but the temperature inside the DPF didn’t reach the required 600°C threshold to safely lower the soot calculation. It stayed around 400°C, too low for proper cleaning, confirming the suspected fault with the fifth injector system.

The current DPF faults also caused:

Cruise control to stop working
Anti-skid system to activate unexpectedly
Gearbox jerking during shifts

Diagnosing and Cleaning the Fifth Injector (Diesel Vaporiser)

The fifth injector’s role is crucial: it sprays diesel fuel into the DPF to raise temperatures during regeneration.

To gain access:

Several small bolts and a banjo bolt retaining the injector were removed.
Caution was taken not to lose a tiny washer that’s easy to misplace.

The injector was heavily clogged with carbon deposits, and the port it fits into was blocked too.

To clean it:

A heat inductor tool was used to gently burn off carbon without open flame risk.
The injector tip glowed red hot, helping clear soot deposits.
Visual checks confirmed spray holes were clear after cleaning.


Steps for Cleaning the Fifth Injector

After refitting the cleaned injector The Land Cruiser reached the crucial 600°C DPF temperature threshold during regeneration, and the particle matter readings began falling steadily to safe levels.

This meant the DPF could now self-clean as designed.

The repair avoided a near £3,500 cost and likely prevented a quick recurrence if only the DPF was replaced without fixing the injector issue.