P0930 Gear Shift Lock Solenoid Control Circuit Low

P0930 indicates the gear shift lock solenoid control circuit is low. The control path is grounded, missing voltage, or below 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 force the shifter out of park as diagnosis; test the low solenoid circuit and brake input first.

Symptoms of P0930

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 P0930

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 shift-lock solenoid control voltage, feed supply, ground integrity, resistance, and current draw while checking for short-to-ground faults.
Inspect fuse feed, brake switch data, console harness, connector terminals, liquid damage, and module driver output.
Compare the low circuit event with brake pedal operation, park status, shift-lock release, and freeze-frame voltage.

Related OBD-II codes

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