No 1-2 Upshift
WARNING: This page is about a different car, the 2002 Infiniti QX4, 2001 Nissan Pathfinder, and 2001 Infiniti QX4. However, it is still accessible from the selected car via links, so may be relevant.
Possible cause: incorrect PNP switch or control linkage adjustment, or faulty shift solenoid valve "A", valve body assembly, revolution sensor or VSS signal, or brake band.