P0930
UniversalP0930 indicates that the Powertrain Control Module (PCM) has detected a low voltage condition within the circuit of the gear shift lock solenoid.
Medium SeverityThis code signifies that the gear shift lock solenoid circuit is experiencing a low voltage signal. This electrical issue can prevent the transmission from shifting out of Park or cause other shifting difficulties, impacting the vehicle's operation.
⚠️ Before You Begin (Safety First)
Always ensure the vehicle is on a level surface and the parking brake is engaged before performing any diagnostics or repairs. Disconnect the negative battery terminal before working on electrical components to prevent accidental shorts or injury.
Common Symptoms
- Vehicle stuck in Park
- Difficulty shifting gears
- Check Engine Light illuminated
- Brake lights not working (in some cases, as the solenoid is often linked to the brake pedal switch)
- Key stuck in ignition
Common Causes
- Faulty gear shift lock solenoid
- Corroded or damaged wiring or connectors in the solenoid circuit
- Blown fuse related to the shift interlock system
- Malfunctioning brake light switch (which often controls the shift lock solenoid)
- Faulty Powertrain Control Module (PCM) (rare)
Frequently reported on: General/Universal
Diagnostic Steps
- Check all fuses related to the transmission, brake lights, and shift interlock system. Replace any blown fuses.
- Inspect the wiring and connectors leading to the gear shift lock solenoid for signs of damage, corrosion, or looseness. Repair as necessary.
- Test the brake light switch for proper operation, as it often sends a signal to release the shift lock. Replace if faulty.
- Using a multimeter, test the voltage at the gear shift lock solenoid connector. A low voltage may indicate a wiring issue or a faulty PCM (less common).
- If accessible, test the resistance of the gear shift lock solenoid itself. Compare readings to manufacturer specifications.
- If the solenoid is determined to be faulty and accessible, replace it.
👨🔧 When to Call a Professional
If you lack experience with electrical diagnostics or console disassembly, or if the issue persists after basic troubleshooting, it is highly recommended to consult a certified mechanic.
Commonly Asked Questions
What is the gear shift lock solenoid and what does it do?
The gear shift lock solenoid is an electronic component that prevents you from shifting out of Park unless the brake pedal is pressed. It's a safety feature to ensure the vehicle is stationary before shifting.
Can I still drive my car with a P0930 code?
If the vehicle is stuck in Park, you will not be able to drive it. If you manage to get it out of Park, it's generally not recommended to drive for long, as other safety features might be compromised.
Is a P0930 code expensive to fix?
The cost can vary greatly. If it's a blown fuse or a simple wiring issue, it might be inexpensive. If the solenoid itself needs replacement, parts and labor could range from $100 to $400, depending on vehicle make/model and accessibility.
Does replacing the brake light switch fix P0930?
Sometimes, yes. The brake light switch often signals the shift lock solenoid to release. If the switch is faulty, the solenoid won't receive the correct signal, potentially triggering this code. It's a common and relatively easy first step in diagnosis.
Where is the gear shift lock solenoid located?
Its exact location varies by vehicle, but it is typically located within the shifter assembly under the center console. Access usually requires removal of the console trim.