P092C: Gear Shift Lock Solenoid/Actuator Control Circuit B Low

What it means

The gear shift lock solenoid/actuator control circuit B reports a control circuit b low condition. Selector lever interlock cannot be commanded reliably.

At a glance

• Usually lights the check-engine light

How it works

Circuit B operates the gear-shift lock solenoid or actuator that helps prevent the selector leaving Park before release conditions are met. P092C sets when the module detects circuit B voltage lower than expected, commonly from a wire shorted to ground or an internally shorted coil.

Common causes

Most likely first.

1. Control wire shorted to ground
2. Internal short in coil

Symptoms

• Selector may not shift out of Park
• Shift-lock warning or check-engine light may illuminate

How to diagnose it

1. Save freeze-frame data and check for related shift-lock or transmission codes before clearing the fault.
2. Check whether the selector releases from Park when the brake is pressed, and note whether the fault returns during operation.
3. Inspect circuit B wiring for insulation rubbed through to ground and check the connector for moisture, corrosion, or damaged terminals.
4. With a scan tool, observe circuit B status while commanding the interlock, if that function is available.
5. Test circuit B for a short to ground and check the actuator coil, following the manufacturer's specification.
6. If the short is not present at rest, isolate sections of the circuit to locate an intermittent ground fault.

Common fixes

• Repair circuit B insulation where the wire is shorted to ground.
• Clean or repair corroded or damaged circuit B connector terminals.
• Replace the circuit B actuator if its coil is internally shorted.

Can I keep driving?

Do not force the selector if it remains locked in Park. If it releases and the transmission shifts normally, limit driving and get the circuit checked soon; a worsening fault can leave the vehicle unable to select a gear.