ENGINE (DIAGNOSTICS)(H4DOTC DIESEL) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)

DTC P0401 EGR ABNORMAL (EGR AMOUNT TOO SMALL)

DTC DETECTING CONDITION:

Detected when two consecutive driving cycles with fault occur.

TROUBLE SYMPTOM:

Poor acceleration

CAUTION:

After servicing or replacing faulty parts, perform Clear Memory Mode , and Inspection Mode .

STEPCHECKYESNO

1.CHECK DTC.

1) Clear the memory using the Subaru Select Monitor or general scan tool.

2) Perform drive cycle G.

Is the same DTC as current diagnosis output?

Replace the EGR cooler.

Even if DTC is detected, the circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again.

NOTE:

In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause.