Powertrain, generic (extended)

P2709 Shift Solenoid F Electrical

Check engine lightOn

EmissionsRelevant

Drive cycleNot required

Limp modePossible

P2709 flags an electrical fault on shift solenoid F, found by the output driver rather than by watching the gearbox shift. Hyundai and Kia list it as the circuit code for that valve: Kia bulletin TRA 051 and Hyundai 15-AT-010 call solenoid F SS-B on their six-speed transaxles and replace parts instead of the gearbox, Kia first the solenoid, then the harness to the PCM, and only then the PCM if the code returns; Hyundai 12-AT-015-1 does the same for the 2012-2013 Genesis eight-speed. Ford is inconsistent: its 2024 summary text sends shorts on solenoid F to P0998/P0999, yet its tables give P2709 for a short to ground on 10R and 8F35/8F40 units and as the general electrical fault on 8F57/8F24, flagged after 1.5 s of driver feedback. Shifts using that clutch are lost.

Likely causes

Defective coil in shift solenoid F (Hyundai/Kia replace the solenoid first)

Chafed or corroded wiring or connector between PCM/TCM and transmission

Damaged internal transmission harness or lead frame

Faulty output driver in the PCM/TCM

Symptoms

MIL lit and transmission in a fail-safe gear
Missing gears or sudden harsh shifts
Code returns immediately after clearing if the fault is permanent

Repair estimate

DifficultyMediumWorkshop job

Parts and labour€80–900

Time0.5–4 h

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

Parts involved

shift solenoid fwiring harness

References: static.nhtsa.gov, static.nhtsa.gov, static.nhtsa.gov, fordservicecontent.com.