Incorrect Fluid Pressure in the Clutch C2.

Perform the Transmission Fluid Check .

Accumulator Valve for the 1-2 Shift is blocked or leaking.

Replace the Accumulator Valve.

Loss of fluid in Clutch C2 or in the Fluid Circuit. Only recognizable upon the Transmission removal and disassembly.

1. Search for the leaking part.
2. Replace the leaking part.

Main Pressure is incorrect.

Perform the Transmission Fluid Check .