Powertrain, generic · Transmission

P0930 Gear Shift Lock Solenoid/Actuator Control Circuit A Low

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

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.

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

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

Repair estimate

DifficultyMediumDIY possible
Parts and labour€40–600
Time0.5–2.5 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

gear shift lock solenoid awiring harnesstcm

Related codes

P0928P0929P0931P092CP0572

References: law.cornell.edu, static.nhtsa.gov, static.nhtsa.gov.