P0908 Gate Select Position Circuit Intermittent

P0908 indicates an intermittent gate select position circuit fault. The gate position signal drops out or becomes invalid only during some conditions.

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 clear intermittent gate position faults without reproducing the signal dropout.

Useful checks before replacing parts

Graph gate position data during shifter movement, actuator operation, heat soak, vibration, and harness wiggle testing.
Inspect connector locking, terminal tension, wire flex points, sensor mounting, actuator vibration, and shared reference stability.
Check whether the intermittent signal loss coincides with shift aborts, wrong gear selection, or adaptation errors.

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.