Powertrain, generic · Transmission

P0919 Gear Shift Position Control Error

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modePossible

Set when the control module of an automated manual gearbox drives the shift actuator towards a gear, but the measured shift position does not reach the target within the allowed time and tolerance. Sensor and actuator circuits can be electrically intact; the fault concerns the closed loop as a whole. Usual reasons are a stiff or jammed shift rail or synchroniser, a weak actuator, low hydraulic pressure on hydraulic units, or a sensor offset. No manufacturer documents this code publicly. A Hyundai/Kia patent detects jammed shift actuators from motor current, and an Isuzu patent controls the shift motor by stroke ranges using a shift stroke sensor. CARB requires functional checks on such outputs. P0909 is the same error in the select direction, P0920 to P0927 the actuator circuits. Gears may not engage.

Likely causes

Stiff or jammed shift rail, shift fork or synchroniser
Worn shift motor or leaking shift cylinder that no longer delivers full force
Low pressure in the hydraulic supply on hydraulically actuated units
Shift positions not relearned after actuator or module replacement

Symptoms

  • Transmission warning light on
  • Gear does not engage or engages only after a delay
  • Gearbox remains in neutral or locks in one gear

Repair estimate

DifficultyHardWorkshop job
Parts and labour€150–2,500
Time1–6 h

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

Parts involved

gear shift actuatorgear shift position sensor atcm

Related codes

P0909P0914P0915P0920P0924

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