P0907 Gate Select Position Circuit High

P0907 points to a high gate select position circuit. The position signal is above range, open, or shorted to voltage.

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 replace the actuator before proving the high position signal is not caused by wiring or reference faults.

Symptoms of P0907

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 P0907

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

Check position sensor signal, reference, ground, connector continuity, open circuits, short-to-voltage faults, and module input voltage.
Inspect sensor connector fit, linkage or actuator travel, harness damage, water intrusion, and recent transmission service areas.
Compare live gate position data with commanded movement to determine whether the high signal is fixed or movement-related.

Related OBD-II codes

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