P0922 Gear Shift Forward Actuator Circuit Low

P0922 indicates the gear shift forward actuator circuit is low. The control circuit is grounded, missing voltage, or below the expected electrical range.

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 diagnose mechanical shift failure until the low forward actuator circuit is repaired.

Symptoms of P0922

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 P0922

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

Measure forward actuator command voltage, feed, ground, resistance, and current while checking for short-to-ground faults.
Inspect connector terminals, relay or fuse supply, module driver output, harness rub points, and actuator winding condition.
Compare the low circuit event with gear selection failure, position feedback, system voltage, and freeze-frame temperature.

Related OBD-II codes

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