P099D code meaning
Shift Solenoid H Control Circuit Range/Performance
Powertrain system Generic code P09xx codes Check engine light
What P099D means
Electrical feedback from the drive circuit of shift solenoid H does not fit the command, although no hard short or open is seen. No manufacturer was found to document this code. Solenoid H means an eighth shift solenoid. The only documented H user, the 2017–2018 Genesis G80 and G90, reports its on/off solenoid for the shift-by-wire park function under P076A and P076D, outside this block. Ford's OBD summaries describe shift solenoid checks only up to E, with separate open, short to ground and short to power codes and 0.5 to 5 s electrical monitoring. CARB requires transmission outputs to be checked for proper function. Low and high are P099E/P099F, the open circuit is P09A1.
P099D at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyHard
- Typical labor1 to 5 hours
- Clears after repairAfter a drive cycle
Symptoms of P099D
- Warning light depending on calibration
- Harsh or missing shifts involving this solenoid
Common causes of P099D
- Most likelySolenoid coil resistance out of specification
- PossibleHigh-resistance connector or harness contact
- Less likelyWeak driver stage in the transmission control module
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 P099D 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. |
| 9D | The exact fault in that area. |
What to do next
- Note P099D 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 P099D
What does P099D mean?
P099D means "Shift Solenoid H Control Circuit Range/Performance". Electrical feedback from the drive circuit of shift solenoid H does not fit the command, although no hard short or open is seen. It is a generic code, so it means the same on every make.
Is it safe to drive with P099D?
Drive gently and only to a workshop. With P099D the car can go into limp mode (reduced power) to protect itself.
Will P099D fail an emissions test?
Yes, it can. P099D 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 P099D to fix?
Difficulty: hard. A typical repair takes 1 to 5 hours of work. This is a job for a workshop.
Will P099D clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.