P0782 2-3 Shift Malfunction

P0782 indicates a 2-3 shift malfunction. The controller saw abnormal speed or pressure behavior during the second-to-third gear change.

Code details

Generic OBD-II · P0

System: Transmission
Code type: Generic (SAE / ISO controlled)
Standard: SAE J2012 / ISO 15031-6

Diagnostic boundary

A diagnostic trouble code reports that a monitored test failed. It does not prove one specific part is bad, and manufacturer logic can add vehicle-specific conditions.

Do not replace internal parts before checking solenoid commands, pressure behavior, fluid state, and speed sensor signals.

Symptoms of P0782

Harsh, delayed, or slipping shifts, or being stuck in one gear.
Check-engine light, sometimes with limp-home mode.
Flaring RPM or a shudder under load.

Common causes of P0782

Low or degraded transmission fluid.
A failing speed sensor, shift solenoid, or pressure-control circuit.
Wiring, connector, or internal hydraulic/mechanical faults.

Useful checks before replacing parts

Compare commanded 2-3 shift, actual ratio, input speed, output speed, solenoid command, and pressure-control data.
Inspect fluid condition, valve-body operation, speed sensor data, and related solenoid or ratio codes.
Determine whether the malfunction appears only hot, cold, under load, or during adaptive shift learning.

Related OBD-II codes

These nearby transmission entries can help compare wording and pin down the fault area.