Powertrain, generic (extended)

P28E2 Shift Motor Phase U-V-W Circuit/Open

Check engine lightOn
EmissionsNot relevant
Drive cycleNot required
Limp modePossible

P28E2 reports that no current can flow in at least one shift motor phase, usually a broken lead, a loose terminal or an open winding. Hyundai documents it in bulletin 22-AT-001H with failure type 14 (P28E214), an open UVW motor circuit, for the push-button shift-by-wire of the 2020-on Palisade and Sonata, the 2021-on Santa Fe and Santa Fe Hybrid and the 2022-on Tucson and Tucson Hybrid. Drivers see a shifter system malfunction message and may be unable to leave Park or start. For the Santa Fe the bulletin asks to remove air cleaner, battery and tray and check whether the actuator harness has rubbed through on the battery tray, then repair it. A Denso patent shows the U-V-W motor driver behind such actuators. CARB requires circuit checks on outputs.

Likely causes

Actuator harness chafed open, on the Santa Fe at the battery tray (Hyundai 22-AT-001H)
Loose or damaged pin in the SBW actuator connector
Open winding inside the SBW actuator

Symptoms

  • Shifter system malfunction message in the cluster
  • Cannot shift into or out of gear or out of Park
  • Wrong gear display or no start

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€100–1,500
Time1–4 h

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

Parts involved

shift motorshift motor position sensortcm

Related codes

P28E0P28E1P28E3P28E5

References: static.nhtsa.gov, patents.google.com, law.cornell.edu.