DTC P0734: A/T 4TH Gear Function: Description: Notes

• This malfunction will not be detected while the A/T CHECK indicator lamp is indicating another self-diagnosis malfunction.
• This malfunction is detected when the A/T does not shift into fourth gear position or line pressure is low as instructed by the TCM. This is not caused by electrical malfunction (circuits open or shorted) but by mechanical malfunction such as control valve sticking, improper solenoid valve operation, malfunctioning oil pump or torque converter clutch, etc.

Fig 1: DTC P0734 A/T 4th Gear Function Table

Courtesy of NISSAN MOTOR CO., U.S.A.