P0925 Gear Shift Reverse Actuator Circuit Range/Performance

P0925 points to gear shift reverse actuator range/performance. Reverse actuator movement or feedback does not match the commanded operation.

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 reverse mechanical parts until command, feedback, and actuator movement have been compared.

Symptoms of P0925

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 P0925

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 reverse actuator command, current draw, position feedback, learned travel, reverse inhibit inputs, and shift completion timing.
Inspect actuator binding, linkage adjustment, connector voltage drop, mechanical obstruction, calibration state, and related clutch control data.
Check whether the fault occurs only when selecting reverse, after warm-up, during low system voltage, or after gearbox service.

Related OBD-II codes

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