Powertrain, generic · Transmission

P0911 Gate Select Actuator Circuit Range/Performance

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

Plausibility fault in the drive circuit of the gate select actuator of an automated manual gearbox. The circuit is neither open nor shorted, but the current, voltage or response measured on it does not fit the command, for example a current that is too high or too low for the requested movement. No manufacturer documents this code publicly. A Hyundai/Kia patent explains why controllers watch actuator current closely: jamming and sticking raise the motor load, and the motor can be damaged if this is not caught early. An Isuzu patent describes electric select actuators controlled by the transmission module. CARB requires functional checks on such outputs. P0910, P0912 and P0913 are the clear electrical faults, P0909 the failure to reach a gate. Gear changes become slow or are blocked.

Likely causes

Worn select motor drawing abnormal current
Stiff select mechanism overloading the actuator
High resistance in actuator wiring or connector

Symptoms

  • Check engine or transmission warning light on
  • Slow, hesitant or aborted gear changes
  • Gearbox enters fallback mode with limited gears

Repair estimate

DifficultyHardWorkshop job
Parts and labour€100–1,800
Time0.5–4 h

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

Parts involved

gate select actuatorwiring harnesstcm

Related codes

P0909P0910P0912P0913

References: law.cornell.edu, patents.google.com, patents.google.com.