P099A code meaning
Shift Solenoid G Control Circuit Range/Performance
Powertrain system Generic code P09xx codes Check engine light
What P099A means
The drive circuit of shift solenoid G is electrically intact, but current or voltage feedback does not fit the command. No manufacturer was found to document this code. The two documented users of the G control circuit codes report only the hard faults: Mitsubishi's 2019 six-speed (low-reverse brake shift solenoid) uses P099B for a short and P099C for an open, and Nissan's RE0F11A CVT lists P099B/P099C. Hyundai and Genesis report their on/off solenoid G under P075A and P075D. The slot would follow the pattern FCA uses for solenoids 2 to 5 (P0975 to P0984, control circuit performance). CARB requires transmission outputs to be checked for function. Low and high are P099B/P099C, open P09A0.
P099A 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 P099A
- Warning light depending on calibration
- Harsh or missing shifts involving this solenoid
- Possible limp mode
Common causes of P099A
- 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 gWiring harnessTCM
What each part of P099A 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. |
| 9A | The exact fault in that area. |
What to do next
- Note P099A 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 P099A
What does P099A mean?
P099A means "Shift Solenoid G Control Circuit Range/Performance". The drive circuit of shift solenoid G is electrically intact, but current or voltage feedback does not fit the command. It is a generic code, so it means the same on every make.
Is it safe to drive with P099A?
Drive gently and only to a workshop. With P099A the car can go into limp mode (reduced power) to protect itself.
Will P099A fail an emissions test?
Yes, it can. P099A 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 P099A to fix?
Difficulty: hard. A typical repair takes 1 to 5 hours of work. This is a job for a workshop.
Will P099A 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.