Code No. P1498: Excessive PM Accumulated In DPF

FUNCTION

The engine-ECU monitors the input signals from sensors to estimate the PM amount loaded to the DPF inside.
If the PM is loaded more than the specified amount, the DPF regeneration is automatically executed under certain conditions in order to eliminate the PM.
If the PM is excessively loaded, the engine-ECU does not execute the automatic DPF regeneration. It makes the engine warning lamp illuminate and allow the DPF warning mark to be shown.

TROUBLE JUDGEMENT

Check Condition

Ignition switch is in "ON" position.

Judgement Criterion

Driving distance exceeds the specified value after the last DPF regeneration.

FAIL-SAFE AND BACKUP FUNCTION

The throttle valve is opened (electrical discontinuity).
The EGR control is stopped (fully closed).
The DPF regeneration is prohibited.
The fuel injection amount is restricted (output restriction).
The open angle of the accelerator pedal is restricted.

PROBABLE CAUSE

The PM is abnormally loaded to the DPF inside.
Failed small injection quantity learning.

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III diagnosis code.

Check whether diagnosis code P2463 is set together with P1498 or not.

Q. Is diagnosis code P2463 set?

	Troubleshoot diagnosis code P2463 (Refer to ).

	Go to Step 2.

STEP 2. Forcible DPF regeneration execution

Carry out the forcible DPF regeneration (Refer to GROUP 17 - Emission Control <DIESEL> - Diesel Particulate Filter (DPF) System - Forcible DPF Regeneration ).
Carry out the small injection quantity learning procedure (Refer to GROUP 00 - Precautions Before Service - Small Injection Quantity Learning Procedure ).

Q. Is the diagnosis code set?

	Inspection chart for diagnosis code (Refer to ).

	Check end.