Powertrain, generic · Transmission

P08D8 Shift Solenoid K Electrical

Check engine lightOn

EmissionsRelevant

Drive cycleNot required

Limp modePossible

Collective electrical fault for shift solenoid K, used by makers that do not split circuit faults into low, high, open or range codes. No manufacturer documents this code publicly. The pattern exists for earlier letters: Hyundai stores P0753 (shift control solenoid valve A electrical) on the Genesis G80 and G90 8-speed and, per bulletin 21-AT-016HG, replaces the solenoid once the harness checks out, with valves listed only up to F. Ford's electrical check fails a solenoid when the driver feedback contradicts the command for 0.5 to 5 seconds. CARB requires circuit monitoring of transmission outputs. P08DA to P08DD are the detailed codes. The TCM usually reacts at once with altered shifting.

Likely causes

Solenoid coil open or shorted

Damaged harness or corroded connector

TCM output driver fault

Symptoms

Check engine or transmission warning light on
Harsh or missing shifts
Transmission may lock into a limp-home gear

Repair estimate

DifficultyHardWorkshop job

Parts and labour€100–1,500

Time1–5 h

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

Parts involved

shift solenoid ktcmtransmission wiring

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