Gate Select Position Circuit A Intermittent
What it means
P0908 appears on automated-manual and robotized gearboxes when the gate-select position signal — which tells the controller where the shift actuator is across the shift gates — cuts in and out intermittently. Without a steady position signal the controller can't reliably line up the next gear, causing the occasional rough or missed shift and sometimes a brief fail-safe mode. The engine still starts and runs; an intermittent fault like this usually traces to a marginal connector, chafed wiring, or a sensor starting to fail.
Can I keep driving? Driveable, but shifts may be intermittently rough or missed and the transmission may briefly enter limp mode; fix it before it becomes constant.
Common symptoms
What you'll notice
- Check-engine light (may be intermittent)
- Intermittent rough or missed shifts
- Erratic gear selection
- Possible brief limp (fail-safe) mode
Common causes
Most likely first
- Loose or poor connection in the gate-select position circuitLikely
- Chafed or corroded wiring or connectorCommon
- Intermittent gate-select position sensor faultCommon
- Poor ground connectionLess often
- Faulty control module (less common)Less often
How to diagnose & fix
Work through it in order
- Read freeze-frame data and wiggle-test the connector while watching live position data for dropouts.
- Inspect the wiring, connectors, and grounds for intermittent faults.
- Secure and clean any loose or corroded connections.
- Replace the gate-select position sensor if it drops out under test.
- Clear the code and road-test.
FAQ
Quick answers
Is it safe to drive with P0908?+
Can I just clear P0908?+
Related codes
Often seen with P0908
Read & clear P0908 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.