P099F code meaning
Shift Solenoid H Control Circuit High
Powertrain system Generic code P09xx codes Check engine light
What P099F means
High-voltage fault in the control circuit of shift solenoid H, from a short to voltage or, on pull-up driver designs, an open coil or wire. No manufacturer was found to document this code. Genesis' 2017–2018 G80/G90 shift-by-wire, the only documented H user, files its park-function on/off solenoid under P076A and P076D, and bulletin 21-AT-016HG fixes it by replacing valve and electronic module. For the high-side logic, Mitsubishi's six-speed is the nearest model: on solenoid G it treats 3.7 V or more for 0.5 s while commanded off as an open circuit. Ford's summaries give short to power its own code for each of solenoids A to E. CARB requires output circuit checks. P099E is the low side.
P099F at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyHard
- Typical labor1 to 5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P099F
- Check engine light
- Limp mode or missing gears
Common causes of P099F
- Most likelyOpen control wire or connector
- PossibleControl wire shorted to voltage
- PossibleOpen solenoid coil
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Shift solenoid hWiring harnessTCM
What each part of P099F means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 9 | Area: transmission. |
| 9F | The exact fault in that area. |
What to do next
- Note P099F and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P099F
What does P099F mean?
P099F means "Shift Solenoid H Control Circuit High". High-voltage fault in the control circuit of shift solenoid H, from a short to voltage or, on pull-up driver designs, an open coil or wire. It is a generic code, so it means the same on every make.
Is it safe to drive with P099F?
Drive gently and only to a workshop. With P099F the car can go into limp mode (reduced power) to protect itself.
Will P099F fail an emissions test?
Yes, it can. P099F is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P099F to fix?
Difficulty: hard. A typical repair takes 1 to 5 hours of work. This is a job for a workshop.
Will P099F clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.