P0928 Gear Shift Lock Solenoid Control Circuit/Open

P0928 indicates a gear shift lock solenoid control circuit or open-circuit fault. The shift-lock solenoid command path is incomplete or unavailable.

Code status

Needs verification

Not yet verified against SAE J2012_202509 / J2012DA. Treat unverified rows as a lookup aid, not repair authority.

System: Transmission
Scope: iso-sae-controlled-p0
Standard: SAE J2012 / ISO 15031-6
Source: legacy-import

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 bypass the shift-lock system; it is a safety function and the solenoid circuit should be repaired.

Useful checks before replacing parts

Check shift-lock solenoid feed voltage, ground control, resistance, connector fit, brake switch input, and circuit continuity under load.
Inspect shifter wiring, console connector condition, fuse or relay supply, spilled-liquid damage, and module driver output.
Compare brake pedal data, park/neutral state, shift-lock command, and actual shifter release behavior during the fault.

Related OBD-II codes

These nearby transmission entries can help compare wording and fault area. They may share the same verification status as the source database.