Gear Shift Lock Solenoid/Actuator Control Circuit Open
The P0928 code indicates that the Powertrain Control Module (PCM) has detected an open circuit 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. An open circuit means there is a break in the electrical path, which can prevent the solenoid from functioning, potentially causing the shifter to be stuck in Park or allowing shifting without brake application.
01. Most Common Causes
- Open or shorted wiring in the shift lock solenoid circuit
- Faulty shift lock solenoid/actuator
- Blown fuse or bad relay
- Faulty brake pedal position switch
- Corroded or loose electrical connectors
02. Symptoms You Will Notice
- Unable to shift out of Park
- Shifter moves out of Park without pressing brake
- Check Engine Light illuminated
- Brake lights may not work properly
03. Step-by-Step Diagnosis
Step 1: Use a scan tool to confirm P0928 and check for related codes.
Step 2: Visually inspect the shift lock solenoid wiring and connectors for damage, corrosion, or loose connections.
Step 3: Test the shift lock solenoid resistance with a multimeter; compare to manufacturer specs.
Step 4: Check the brake pedal position switch operation and circuit continuity.
Step 5: Inspect fuses and relays related to the shift lock system.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive with this code as the shifter may be stuck in Park or may shift unexpectedly, posing a safety risk.
How much does it cost to fix?▼
Repair costs typically range from $50 to $150 for parts and labor, depending on the specific cause and vehicle model.