P0920 Gear Shift Forward Actuator Circuit/Open

P0920 indicates a gear shift forward actuator circuit or open-circuit fault. The electrical path for forward gear actuator movement is incomplete.

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 command the actuator repeatedly until the open circuit and load path are checked.

Useful checks before replacing parts

Check forward actuator feed, ground, driver command, resistance, current draw, connector fit, and circuit continuity under load.
Inspect actuator wiring, module connector pins, transmission connector sealing, harness routing, and signs of water or fluid intrusion.
Compare forward actuator command with gear position feedback to confirm whether the fault is electrical or mechanical.

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.