Powertrain, generic · Transmission

P08D5 Shift Solenoid K

Check engine lightOn

EmissionsRelevant

Drive cycleNot required

Limp modePossible

Base code for shift solenoid K, the eleventh on/off shift valve in SAE's lettering. Which valve carries the letter is up to the manufacturer, and none documents K publicly: Ford's gasoline OBD summary lists shift solenoids only up to SS E, Hyundai's bulletin 21-AT-016HG for the Genesis 8-speed ends at shift control solenoid F, and GM's 2016 to 2025 tables contain no code of the K group. Ford shows how a base code can be used: its P0750 stands for an open circuit of solenoid A. CARB requires functional and circuit monitoring of shift solenoids. P08D6 to P08DD split the fault into functional and circuit types. Expect harsh or missing shifts and possibly a fixed substitute gear.

Likely causes

Shift solenoid K faulty (coil or valve)

Harness or connector fault between TCM and solenoid

Degraded or contaminated transmission fluid

TCM output fault

Symptoms

Check engine or transmission warning light on
Harsh, delayed or missing shifts
Transmission may hold a substitute 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

shift solenoid kvalve body

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