Powertrain, generic · Transmission

P099E Shift Solenoid H Control Circuit Low

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

Low-voltage fault, typically a short to ground, in the control circuit of shift solenoid H. No manufacturer was found to document this code. A solenoid H exists only on transmissions with eight or more shift solenoids; Genesis' 2017–2018 G80/G90, the one documented H user, reports its park-function on/off solenoid under P076A and P076D. The closest documented logic is from lower letters: Mitsubishi detects a short on its solenoid G when the voltage stays below 3.7 V for 0.5 s while commanded on, and Ford's summaries store separate short-to-ground codes for solenoids A to E, checked continuously. CARB requires such circuit checks on transmission outputs. P099F is the high side, P09A1 the open circuit.

Likely causes

Control wire shorted to ground
Shorted solenoid coil
Transmission control module driver fault

Symptoms

  • Check engine light
  • Limp mode or missing gears

Repair estimate

DifficultyHardWorkshop job
Parts and labour€100–1,800
Time1–5 h

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

Parts involved

shift solenoid hwiring harnesstcm

Related codes

P099DP099FP09A1P099BP076D

References: law.cornell.edu, mitsubishitechinfo.com, fordservicecontent.com.