P099E code meaning
Shift Solenoid H Control Circuit Low
Powertrain system Generic code P09xx codes Check engine light
What P099E means
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.
P099E 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 P099E
- Check engine light
- Limp mode or missing gears
Common causes of P099E
- Most likelyControl wire shorted to ground
- PossibleShorted solenoid coil
- Less likelyTransmission control module driver fault
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 P099E 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. |
| 9E | The exact fault in that area. |
What to do next
- Note P099E 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 P099E
What does P099E mean?
P099E means "Shift Solenoid H Control Circuit Low". Low-voltage fault, typically a short to ground, in the control circuit of shift solenoid H. It is a generic code, so it means the same on every make.
Is it safe to drive with P099E?
Drive gently and only to a workshop. With P099E the car can go into limp mode (reduced power) to protect itself.
Will P099E fail an emissions test?
Yes, it can. P099E 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 P099E to fix?
Difficulty: hard. A typical repair takes 1 to 5 hours of work. This is a job for a workshop.
Will P099E clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.