P0931
UniversalGear Shift Lock Solenoid Circuit High
High SeverityA P0931 code indicates that the Powertrain Control Module (PCM) has detected a high voltage condition in the circuit for the Gear Shift Lock Solenoid. This solenoid is responsible for preventing the vehicle from being shifted out of Park without the brake pedal being depressed, and a circuit high condition can often prevent gear engagement.
⚠️ Before You Begin (Safety First)
Always disconnect the battery before performing any electrical repairs. Ensure the vehicle is securely parked on a level surface with the parking brake engaged to prevent accidental movement. Exercise caution when working around electrical components and the shifter mechanism.
Common Symptoms
- Vehicle stuck in Park
- Cannot shift out of Park
- Check Engine Light illuminated
Common Causes
- Faulty gear shift lock solenoid
- Shorted or open wiring in the solenoid circuit
- Corroded electrical connectors
- Faulty Powertrain Control Module (PCM) (rare)
Frequently reported on: General/Universal
Diagnostic Steps
- Check for blown fuses related to the shift interlock system in the fuse box, often located under the hood or dash.
- Inspect the wiring and electrical connectors leading to the gear shift lock solenoid for signs of damage, fraying, corrosion, or short circuits.
- Locate the gear shift lock solenoid (typically within the shifter assembly under the center console) and test its resistance with a multimeter. Compare your reading to manufacturer specifications.
- If the solenoid tests faulty, consider replacing it. This process usually involves carefully removing portions of the center console to gain access.
- After any repair, clear the code with an OBD-II scanner and test the shift interlock function.
👨🔧 When to Call a Professional
If you have checked the wiring and fuse and confirmed the gear shift lock solenoid is faulty but are uncomfortable with disassembling the shifter console or diagnosing complex electrical issues, it is best to consult a professional mechanic.
Commonly Asked Questions
What is a gear shift lock solenoid?
It's an electrical component designed as a safety feature that locks your vehicle's shifter in Park until you press the brake pedal, preventing accidental movement.
Can I drive with a P0931 code?
No, this code usually means you cannot shift the vehicle out of Park, rendering it undrivable until the issue is resolved.
Where is the gear shift lock solenoid located?
It is typically located within the gear shifter assembly itself, usually found under the center console of your vehicle.
Is it safe to bypass the shift lock?
Bypassing the shift lock is not recommended as it disables a critical safety feature designed to prevent accidental shifting and potential accidents.
Do I need special tools to fix this problem?
Basic hand tools such as screwdrivers, a socket set, a multimeter for testing, and potentially a trim removal tool for the center console are usually sufficient.