P0906
PowertrainTransmission Shifthigh severityGate Select Actuator Circuit High
What P0906 Means
The gate select actuator circuit voltage is higher than expected. This points to an open circuit or short to voltage affecting shift control.
Symptoms
- Improper gear selection
- Warning light on
- Rough shifting
Common Causes
- Short to voltage in wiring
- Open actuator circuit
- Faulty gate select actuator
- Faulty transmission control module
Diagnostic Steps
- Retrieve diagnostic codes
- Inspect wiring for shorts to power
- Measure circuit voltage with scan tool
- Replace actuator if faulty
🔌 Don't have a code reader?
Any of these will read and clear this code — pick by how deep you want to go.
Budget handheld~$40
ANCEL AD410 →
No-phone-needed handheld — reads, clears, live data, freeze frame.
✓ ANCEL official store
Serious DIY~$100
BlueDriver Pro →
Enhanced codes (ABS, airbag, TPMS) plus repair reports.
SHOP FAVORITEShop-grade tablet~$300
Autel MaxiCOM MK808S →
Bidirectional tests, service resets, all systems.
✓ Autel official store
Pro diagnostics$1,500+
Autel MaxiSys MS906 Pro →
Full-system pro platform — topology mapping, ECU coding, the works.
✓ Autel official store
As an Amazon Associate and Autel/ANCEL partner, OLP earns from qualifying purchases — how we link. This never changes the specs we publish.
Community Confirmed Fixes
No confirmed fixes yet for this code. Be the first to contribute!
Submit a FixFound a Fix for P0906?
Help other technicians by sharing what worked on your vehicle.
Submit Your Fix