Gear Shift Lock Solenoid Circuit Low
The transmission's gear shift lock solenoid isn't receiving enough electrical power to function properly. Think of it like a car door lock that won't engage because the battery is too weak to power it.
The ECU monitors the voltage and current supplied to the gear shift lock solenoid circuit. When voltage drops below the minimum threshold needed to energize the solenoid coil, the ECU detects an open or high-resistance circuit condition. The solenoid requires sufficient current to create the magnetic field that releases the mechanical lock.
| Parameter | Normal Range | Fault Condition |
|---|---|---|
| Solenoid Circuit Voltage | 10.5-14.5V at solenoid | Below 4V or insufficient current draw |
| Circuit Resistance | 4-8 ohms coil resistance | Above 15 ohms or open circuit |
Code P0930 is a moderate fault. You can generally drive to a workshop, but avoid long trips or high-load driving (motorway, uphill towing) until it is diagnosed. If the code keeps returning after clearing, or if you notice the symptoms listed above worsening, do not delay professional diagnosis. Many moderate codes have multiple possible root causes — a mechanic with live OBD data can identify the exact fault more efficiently than part-by-part trial and error.
Once the fault is repaired, P0930 can be cleared using any OBD-II scanner. Connect the scanner, navigate to "Clear Codes" or "Erase DTCs," and confirm. The check engine light turns off immediately.
The code will return if the root cause was not actually fixed. The ECM re-detects the fault within 1–3 drive cycles and sets the code again.