P0930: Gear Shift Lock Solenoid/Actuator Control Circuit A Low

The voltage on control circuit A of the shift lock solenoid stays below the expected level, typically a short to ground or a driver output pulled low. No manufacturer documents this code publicly. FCA uses the sibling codes on the same brake transmission shift interlock (P0928 BTSI Control, P0931 on the 2016 Grand Cherokee). CARB requires output components to be checked for circuit continuity and shorts, while a safety-only system may be exempt, which is why these faults often do not light the MIL. P0928 is the open, P0931 the high fault, P0929 the plausibility fault of circuit A; P092C is the low fault on circuit B. Depending on the design the selector stays locked in Park or is no longer locked at all.

Symptoms

• Selector lever stuck in Park although the brake is pressed
• Selector can be moved out of Park without pressing the brake
• Shift lock override slot needed to move the lever

Most likely causes

• Shift lock control wire chafed through to ground in the console or under the carpet
• Shorted turns in the shift lock solenoid coil
• Spilled liquid in the shifter area causing leakage to ground

What to check, in order

Start with the simplest. You can tick off each step.

1. Check the fluid level and condition according to the manufacturer
2. With the connector unplugged, check whether the signal wire is making contact with ground.
3. Check the transmission connector
4. Read the data with a transmission-compatible scanner
5. Measure the solenoid valve circuit
6. Leave opening the transmission to a specialized repair shop

Good to know

• Repair difficulty: medium

What each character of P0930 means

• P: Powertrain: engine and transmission
• 0: Generic code: same on every make
• 9: Transmission
• 30: Specific fault in that system

Frequently asked questions

Can I keep driving with code P0930?

Drive as little as possible and gently. If the transmission slips or stays in one gear, go slowly to a repair shop or call for a tow truck.

What causes code P0930?

The most common causes are: shift lock control wire chafed through to ground in the console or under the carpet; shorted turns in the shift lock solenoid coil; spilled liquid in the shifter area causing leakage to ground.

Related codes

• P0928Gear Shift Lock Solenoid/Actuator Control Circuit A/Open
• P0929Gear Shift Lock Solenoid/Actuator Control Circuit A Range/Performance
• P0931Gear Shift Lock Solenoid/Actuator Control Circuit A High
• P092CGear Shift Lock Solenoid/Actuator Control Circuit B Low
• P0572Brake Switch A Circuit Low

Sources

• law.cornell.edu: 13 CCR 1968.2
• static.nhtsa.gov: RCLRPT 16V249 8794
• static.nhtsa.gov: SB 10058516 9906

Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.