With CONSULT-II

Start engine and warm it up to normal operating temperature.
Select "SELF-LEARNING CONT" in "WORK SUPPORT" mode with CONSULT-II.

Fig 1: Scan Tool Display - Work Support
Courtesy of NISSAN MOTOR CO., U.S.A.
Clear the self-learning control coefficient by touching "CLEAR".
Run engine for at least 10 minutes at idle speed.
Is the 1st trip DTC P0171, P0174 detected?

Is it difficult to start engine?