Gear Shift Lock Solenoid Circuit Low Voltage
The P0930 code indicates that the powertrain control module (PCM) has detected a low voltage condition in the gear shift lock solenoid/actuator control circuit. This solenoid prevents the shifter from moving out of Park unless the brake pedal is pressed. A low voltage reading suggests a short to ground, faulty solenoid, or wiring issue, which can disable the shift lock function.
01. Most Common Causes
- Faulty gear shift lock solenoid
- Short to ground in the control circuit wiring
- Blown fuse or faulty relay
- Corroded or damaged connector
02. Symptoms You Will Notice
- Unable to shift out of Park
- Brake shift interlock not releasing
- Check Engine Light illuminated
- Shifter stuck in Park
03. Step-by-Step Diagnosis
Step 1: Scan for codes and verify P0930 is present.
Step 2: Inspect the shift lock solenoid fuse and relay; replace if blown.
Step 3: Test the solenoid resistance with a multimeter (specs vary by vehicle).
Step 4: Check wiring and connectors for shorts, opens, or corrosion; repair as needed.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
No, because the shifter may be stuck in Park, preventing the vehicle from being driven. If you can manually override the shift lock, driving is possible but not recommended until repaired.
How much does it cost to fix?▼
Typically $50-$150 for diagnosis and repair, including parts like a solenoid ($20-$50) and labor.