P0930: Gear Shift Lock Solenoid Control Circuit A Low

What it means

Open circuit at the gear shift lock solenoid which prevents shifting out of Park without brake pedal pressed.

At a glance

• Usually lights the check-engine light

How it works

Circuit A supplies or controls the gear-shift lock solenoid that helps keep the selector in Park until the brake pedal is pressed. P0930 indicates the module sees circuit A voltage too low, commonly because the solenoid coil or wiring is open or a connector pin has backed out.

Common causes

Most likely first.

1. Solenoid coil open
2. Wiring open
3. Pin pushed back out of connector body

Symptoms

• Check engine or transmission warning light on
• Harsh, delayed, or missing shifts
• Possible limp mode (locked in one gear)
• Slipping or shuddering during gear changes

How to diagnose it

1. Record freeze-frame data and check for related shift-lock codes before clearing the fault.
2. Press the brake and test whether the selector can leave Park, noting whether the interlock behaves differently when the fault is present.
3. Inspect circuit A connectors for a pushed-back pin, poor terminal fit, corrosion, or a disconnected plug.
4. Trace circuit A wiring for a break or damage, especially near the shift-lock assembly and moving selector parts.
5. Test circuit A continuity and the solenoid coil against the manufacturer's specification.
6. If continuity is intermittent, monitor the circuit while gently moving the harness and connector.

Common fixes

• Reseat a backed-out circuit A connector pin or secure a loose plug.
• Repair a break in circuit A wiring.
• Replace the circuit A solenoid if its coil is open.

Can I keep driving?

Do not force the selector if it will not leave Park. If the selector releases and the vehicle shifts normally, limit driving to necessary trips and arrange a prompt repair because the interlock may stop working consistently.