P0927 Gear Shift Reverse Actuator Circuit High

P0927 points to a high gear shift reverse actuator circuit. The reverse actuator control path is open, shorted to voltage, or above the expected range.

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 perform actuator relearns or replace reverse hardware until the high circuit condition is corrected.

Useful checks before replacing parts

Check reverse actuator circuit voltage, continuity, ground path, connector fit, open circuits, short-to-voltage faults, and driver command state.
Inspect transmission connector terminals, actuator connector sealing, harness damage, and wiring disturbed during clutch or gearbox service.
Compare reverse actuator command with position feedback and reverse inhibit status to separate electrical faults from blocked movement.

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.