P0923
PowertrainTransmission Shifthigh severityGear Shift Forward Actuator Circuit High
What P0923 Means
The forward shift actuator circuit voltage is higher than expected. This usually indicates an open circuit or a short to voltage.
Symptoms
- Forward gears not engaging
- Erratic shift behavior
- Warning light on
Common Causes
- Short to voltage in actuator circuit
- Open actuator circuit
- Failed forward shift actuator
- Faulty transmission control module
Diagnostic Steps
- Scan for stored codes
- Check actuator circuit for shorts to power
- Test actuator ground and supply
- Repair circuit or replace actuator
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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 →
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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
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